The total distance travelled is 200 + 200 = 400 km, while the total time taken is 3 + 2 = 5 hours. Therefore, average speed = 400/5 = 80 km/h. Since the vehicle travels 200 km north and then 200 km south, it returns to the starting point. Hence, displacement is zero and average velocity = 0/5 = 0 kmRead more
The total distance travelled is 200 + 200 = 400 km, while the total time taken is 3 + 2 = 5 hours. Therefore, average speed = 400/5 = 80 km/h. Since the vehicle travels 200 km north and then 200 km south, it returns to the starting point. Hence, displacement is zero and average velocity = 0/5 = 0 km/h.
For more NCERT Solutions of Class 9 Science Exploration Chapter 4 Describing Motion Around Us Question Answer (2026-27)
Yes, the ball’s motion is straight-line motion because it moves along the straight inclined track from O to D. Taking O as the origin, its motion can be represented using a horizontal line showing its successive positions. Since the ball continuously moves in the same direction without changing itsRead more
Yes, the ball’s motion is straight-line motion because it moves along the straight inclined track from O to D. Taking O as the origin, its motion can be represented using a horizontal line showing its successive positions. Since the ball continuously moves in the same direction without changing its path, the total distance travelled and the magnitude of displacement are equal at positions A, B, C and D.
For more NCERT Solutions of Class 9 Science Exploration Chapter 4 Describing Motion Around Us Question Answer (2026-27)
Fuel used in a vehicle depends on the total distance travelled rather than its displacement. Fuel is consumed as the vehicle moves through the actual path covered. For example, if a vehicle travels from home to a place and returns home, its displacement is zero, but it has travelled a certain distanRead more
Fuel used in a vehicle depends on the total distance travelled rather than its displacement. Fuel is consumed as the vehicle moves through the actual path covered. For example, if a vehicle travels from home to a place and returns home, its displacement is zero, but it has travelled a certain distance and consumed fuel. Thus, fuel consumption is related to distance travelled, not displacement.
For more NCERT Solutions of Class 9 Science Exploration Chapter 4 Describing Motion Around Us Question Answer (2026-27)
Since MNOP is inscribed in a circle, both ∠MOP and ∠MNP subtend the same arc MP. ∠MOP is formed at the centre of the circle, whereas ∠MNP is formed at a point on the circumference. According to the theorem, the angle subtended by an arc at the centre is twice the angle subtended by the same arc at aRead more
Since MNOP is inscribed in a circle, both ∠MOP and ∠MNP subtend the same arc MP. ∠MOP is formed at the centre of the circle, whereas ∠MNP is formed at a point on the circumference. According to the theorem, the angle subtended by an arc at the centre is twice the angle subtended by the same arc at any point on the remaining circle.
Therefore,
∠MOP = 2∠MNP.
For more NCERT Solutions for Class 9 Maths Ganita Manjari Chapter 5 I’m Up and Down and Round and Round (2026-27):
A regular hexagon divides the circle into six equal sectors. Therefore, the central angle corresponding to each side is 60°. The triangle formed by two radii and one side has two sides equal to r and included angle 60°, so it is equilateral. Hence, each side of the hexagon is r. The perpendicular diRead more
A regular hexagon divides the circle into six equal sectors. Therefore, the central angle corresponding to each side is 60°. The triangle formed by two radii and one side has two sides equal to r and included angle 60°, so it is equilateral. Hence, each side of the hexagon is r.
The perpendicular distance from the centre to a side is the altitude of this equilateral triangle.
Therefore, distance = (√3/2)r.
For more NCERT Solutions for Class 9 Maths Ganita Manjari Chapter 5 I’m Up and Down and Round and Round (2026-27):
During a family road trip, you drive 200 km north in three hours. Afterwards, you drive 200 km south in two hours. Find the average speed and average velocity for your entire trip.
The total distance travelled is 200 + 200 = 400 km, while the total time taken is 3 + 2 = 5 hours. Therefore, average speed = 400/5 = 80 km/h. Since the vehicle travels 200 km north and then 200 km south, it returns to the starting point. Hence, displacement is zero and average velocity = 0/5 = 0 kmRead more
The total distance travelled is 200 + 200 = 400 km, while the total time taken is 3 + 2 = 5 hours. Therefore, average speed = 400/5 = 80 km/h. Since the vehicle travels 200 km north and then 200 km south, it returns to the starting point. Hence, displacement is zero and average velocity = 0/5 = 0 km/h.
For more NCERT Solutions of Class 9 Science Exploration Chapter 4 Describing Motion Around Us Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-4/
See lessA ball rolls down an inclined track as shown in Fig. 4.6. Is its motion, a straight line motion? Assuming the starting point of the ball (O) to be the origin, can its motion from O to D be depicted using a horizontal line as shown in Fig. 4.3? Are the values of total distance travelled and magnitude of displacement from O equal or different at positions A, B, C and D?
Yes, the ball’s motion is straight-line motion because it moves along the straight inclined track from O to D. Taking O as the origin, its motion can be represented using a horizontal line showing its successive positions. Since the ball continuously moves in the same direction without changing itsRead more
Yes, the ball’s motion is straight-line motion because it moves along the straight inclined track from O to D. Taking O as the origin, its motion can be represented using a horizontal line showing its successive positions. Since the ball continuously moves in the same direction without changing its path, the total distance travelled and the magnitude of displacement are equal at positions A, B, C and D.
For more NCERT Solutions of Class 9 Science Exploration Chapter 4 Describing Motion Around Us Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-4/
See lessFuel used up in a vehicle depends on which of the following? Justify your answer. (i) Total distance travelled (ii) Displacement
Fuel used in a vehicle depends on the total distance travelled rather than its displacement. Fuel is consumed as the vehicle moves through the actual path covered. For example, if a vehicle travels from home to a place and returns home, its displacement is zero, but it has travelled a certain distanRead more
Fuel used in a vehicle depends on the total distance travelled rather than its displacement. Fuel is consumed as the vehicle moves through the actual path covered. For example, if a vehicle travels from home to a place and returns home, its displacement is zero, but it has travelled a certain distance and consumed fuel. Thus, fuel consumption is related to distance travelled, not displacement.
For more NCERT Solutions of Class 9 Science Exploration Chapter 4 Describing Motion Around Us Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-4/
See lessA quadrilateral MNOP is inscribed in a circle. If MN is a diameter, what can you say about ∠MOP and ∠MNP? Explain your reasoning.
Since MNOP is inscribed in a circle, both ∠MOP and ∠MNP subtend the same arc MP. ∠MOP is formed at the centre of the circle, whereas ∠MNP is formed at a point on the circumference. According to the theorem, the angle subtended by an arc at the centre is twice the angle subtended by the same arc at aRead more
Since MNOP is inscribed in a circle, both ∠MOP and ∠MNP subtend the same arc MP. ∠MOP is formed at the centre of the circle, whereas ∠MNP is formed at a point on the circumference. According to the theorem, the angle subtended by an arc at the centre is twice the angle subtended by the same arc at any point on the remaining circle.
Therefore,
∠MOP = 2∠MNP.
For more NCERT Solutions for Class 9 Maths Ganita Manjari Chapter 5 I’m Up and Down and Round and Round (2026-27):
https://www.tiwariacademy.com/ncert-solutions/class-9/maths/ganita-manjari-chapter-5/
See lessA regular hexagon is inscribed in a circle of radius r. Find the length of the sides of the hexagon and the distance of each side from the centre of the circle.
A regular hexagon divides the circle into six equal sectors. Therefore, the central angle corresponding to each side is 60°. The triangle formed by two radii and one side has two sides equal to r and included angle 60°, so it is equilateral. Hence, each side of the hexagon is r. The perpendicular diRead more
A regular hexagon divides the circle into six equal sectors. Therefore, the central angle corresponding to each side is 60°. The triangle formed by two radii and one side has two sides equal to r and included angle 60°, so it is equilateral. Hence, each side of the hexagon is r.
The perpendicular distance from the centre to a side is the altitude of this equilateral triangle.
Therefore, distance = (√3/2)r.
For more NCERT Solutions for Class 9 Maths Ganita Manjari Chapter 5 I’m Up and Down and Round and Round (2026-27):
https://www.tiwariacademy.com/ncert-solutions/class-9/maths/ganita-manjari-chapter-5/
See less