When the slope of distance-time graph is a straight line parallel to time axis, the object is stationary. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-8/
When the slope of distance-time graph is a straight line parallel to time axis, the object is stationary.
• The slope of the distance-time graph for an object in uniform motion is straight line. • The slope of the distance-time graph for an object in non-uniform motion is not a straight line. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-8/
• The slope of the distance-time graph for an object in uniform motion is straight line.
• The slope of the distance-time graph for an object in non-uniform motion is not a straight line.
Here we have, Initial velocity, u = 0 m/s Final velocity, v = 40 km/h = 40×1000/3600 ms⁻¹=100/9 ms⁻¹ Time (t) = 10 minute = 60 × 10 = 600 s Acceleration (a) =? We know that, v = u + at ⇒𝑎=𝑣−𝑢/𝑡=(100/9−0)600=1/54=0.0185 ms⁻² ⇒ a = 0.0185 ms⁻² For more answers visit to website: https://www.tiwariacadeRead more
Here we have,
Initial velocity, u = 0 m/s
Final velocity, v = 40 km/h = 40×1000/3600 ms⁻¹=100/9 ms⁻¹
Time (t) = 10 minute = 60 × 10 = 600 s
Acceleration (a) =?
We know that, v = u + at
⇒𝑎=𝑣−𝑢/𝑡=(100/9−0)600=1/54=0.0185 ms⁻²
⇒ a = 0.0185 ms⁻²
Here, 𝑢 = 80 𝑘𝑚/ℎ = 80×1000/3600 ms⁻¹=2009 ms⁻¹ 𝑣 = 60 𝑘𝑚/ℎ = 60×1000/3600 ms⁻¹=1509 ms⁻¹ 𝑡 = 5 𝑠 Therefore, acceleration, a =? We know that, v = u + at ⇒a=v-u/t= (150/9-200/9)/5=-50/46=-10/9=-1.1 ms⁻² Therefore, Acceleration is -1.1 ms⁻². For more answers visit to website: https://www.tiwariacademyRead more
Here, 𝑢 = 80 𝑘𝑚/ℎ = 80×1000/3600 ms⁻¹=2009 ms⁻¹
𝑣 = 60 𝑘𝑚/ℎ = 60×1000/3600 ms⁻¹=1509 ms⁻¹
𝑡 = 5 𝑠
Therefore, acceleration, a =?
We know that, v = u + at
⇒a=v-u/t= (150/9-200/9)/5=-50/46=-10/9=-1.1 ms⁻²
(i) A body is said in uniform acceleration when its motion is along a straight line and its velocity changes by equal magnitude in equal interval of time. (ii) A body is said in non-uniform acceleration when its motion is along a straight line and its velocity changes by unequal magnitude in equal iRead more
(i) A body is said in uniform acceleration when its motion is along a straight line and its velocity changes by equal magnitude in equal interval of time.
(ii) A body is said in non-uniform acceleration when its motion is along a straight line and its velocity changes by unequal magnitude in equal interval of time.
Here we have, speed = 3×10⁸ m/s Time = 5 minute = 5 × 60 s = 300 s Using, Distance = Speed × Time ⇒ Distance = 3 ×10⁸ × 300 m = 900 × 10⁸ m = 9.0 × 10¹⁰ m For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-8/
Here we have, speed = 3×10⁸ m/s
Time = 5 minute = 5 × 60 s = 300 s
Using, Distance = Speed × Time
⇒ Distance = 3 ×10⁸ × 300 m = 900 × 10⁸ m = 9.0 × 10¹⁰ m
In the case of uniform motion, the path of an object will look like a straight line. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-8/
In the case of uniform motion, the path of an object will look like a straight line.
In automobiles, odometer is used to measure the distance. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-8/
In automobiles, odometer is used to measure the distance.
The magnitude of average velocity of an object will be equal to its average speed in the condition of uniform velocity in a straight line motion. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-8/
The magnitude of average velocity of an object will be equal to its average speed in the condition of uniform velocity in a straight line motion.
Speed has only magnitude while velocity has both magnitude and direction. So speed is a scalar quantity but velocity is a vector quantity. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-8/
Speed has only magnitude while velocity has both magnitude and direction. So speed is a scalar quantity but velocity is a vector quantity.
What can you say about the motion of an object whose distance-time graph is a straight line parallel to the time axis?
When the slope of distance-time graph is a straight line parallel to time axis, the object is stationary. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-8/
When the slope of distance-time graph is a straight line parallel to time axis, the object is stationary.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-8/
What is the nature of the distance-time graphs for uniform and non-uniform motion of an object?
• The slope of the distance-time graph for an object in uniform motion is straight line. • The slope of the distance-time graph for an object in non-uniform motion is not a straight line. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-8/
• The slope of the distance-time graph for an object in uniform motion is straight line.
• The slope of the distance-time graph for an object in non-uniform motion is not a straight line.
For more answers visit to website:
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A train starting from a railway station and moving with uniform acceleration attains a speed 40 km h–1 in 10 minutes. Find its acceleration.
Here we have, Initial velocity, u = 0 m/s Final velocity, v = 40 km/h = 40×1000/3600 ms⁻¹=100/9 ms⁻¹ Time (t) = 10 minute = 60 × 10 = 600 s Acceleration (a) =? We know that, v = u + at ⇒𝑎=𝑣−𝑢/𝑡=(100/9−0)600=1/54=0.0185 ms⁻² ⇒ a = 0.0185 ms⁻² For more answers visit to website: https://www.tiwariacadeRead more
Here we have,
Initial velocity, u = 0 m/s
Final velocity, v = 40 km/h = 40×1000/3600 ms⁻¹=100/9 ms⁻¹
Time (t) = 10 minute = 60 × 10 = 600 s
Acceleration (a) =?
We know that, v = u + at
⇒𝑎=𝑣−𝑢/𝑡=(100/9−0)600=1/54=0.0185 ms⁻²
⇒ a = 0.0185 ms⁻²
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-8/
A bus decreases its speed from 80 km h–1 to 60 km h–1 in 5 s. Find the acceleration of the bus.
Here, 𝑢 = 80 𝑘𝑚/ℎ = 80×1000/3600 ms⁻¹=2009 ms⁻¹ 𝑣 = 60 𝑘𝑚/ℎ = 60×1000/3600 ms⁻¹=1509 ms⁻¹ 𝑡 = 5 𝑠 Therefore, acceleration, a =? We know that, v = u + at ⇒a=v-u/t= (150/9-200/9)/5=-50/46=-10/9=-1.1 ms⁻² Therefore, Acceleration is -1.1 ms⁻². For more answers visit to website: https://www.tiwariacademyRead more
Here, 𝑢 = 80 𝑘𝑚/ℎ = 80×1000/3600 ms⁻¹=2009 ms⁻¹
𝑣 = 60 𝑘𝑚/ℎ = 60×1000/3600 ms⁻¹=1509 ms⁻¹
𝑡 = 5 𝑠
Therefore, acceleration, a =?
We know that, v = u + at
⇒a=v-u/t= (150/9-200/9)/5=-50/46=-10/9=-1.1 ms⁻²
Therefore, Acceleration is -1.1 ms⁻².
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-8/
When will you say a body is in (i) uniform acceleration? (ii) non-uniform acceleration?
(i) A body is said in uniform acceleration when its motion is along a straight line and its velocity changes by equal magnitude in equal interval of time. (ii) A body is said in non-uniform acceleration when its motion is along a straight line and its velocity changes by unequal magnitude in equal iRead more
(i) A body is said in uniform acceleration when its motion is along a straight line and its velocity changes by equal magnitude in equal interval of time.
(ii) A body is said in non-uniform acceleration when its motion is along a straight line and its velocity changes by unequal magnitude in equal interval of time.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-8/
During an experiment, a signal from a spaceship reached the ground station in five minutes. What was the distance of the spaceship from the ground station? The signal travels at the speed of light, that is, 3 x 10⁸ m/s.
Here we have, speed = 3×10⁸ m/s Time = 5 minute = 5 × 60 s = 300 s Using, Distance = Speed × Time ⇒ Distance = 3 ×10⁸ × 300 m = 900 × 10⁸ m = 9.0 × 10¹⁰ m For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-8/
Here we have, speed = 3×10⁸ m/s
Time = 5 minute = 5 × 60 s = 300 s
Using, Distance = Speed × Time
⇒ Distance = 3 ×10⁸ × 300 m = 900 × 10⁸ m = 9.0 × 10¹⁰ m
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-8/
What does the path of an object look like when it is in uniform motion?
In the case of uniform motion, the path of an object will look like a straight line. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-8/
In the case of uniform motion, the path of an object will look like a straight line.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-8/
What does the odometer of an automobile measure?
In automobiles, odometer is used to measure the distance. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-8/
In automobiles, odometer is used to measure the distance.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-8/
Under what condition(s) is the magnitude of average velocity of an object equal to its average speed?
The magnitude of average velocity of an object will be equal to its average speed in the condition of uniform velocity in a straight line motion. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-8/
The magnitude of average velocity of an object will be equal to its average speed in the condition of uniform velocity in a straight line motion.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-8/
Distinguish between speed and velocity.
Speed has only magnitude while velocity has both magnitude and direction. So speed is a scalar quantity but velocity is a vector quantity. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-8/
Speed has only magnitude while velocity has both magnitude and direction. So speed is a scalar quantity but velocity is a vector quantity.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-8/