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90°
Because horizontal component of gravity is zero along horizontal direction.
Infinite.
They must represent the physical quantities of same nature.
The velocity vectors of a stationary object is a zero vectors.
At the highest Point, K. E.= 1/2 m(v cos θ)²= mv²/4 = 1000/2 = 500J
No. (highest point of vertical upward motion under gravity)
will not change.
Linear velocity
No change
What is the angle between velocity and acceleration at the highest point of a projectile motion ?
90°
90°
See lessA body projected horizontally moves with the same horizontal velocity although it moves under gravity. Why ?
Because horizontal component of gravity is zero along horizontal direction.
Because horizontal component of gravity is zero along horizontal direction.
See lessWhat is the maximum number of component into which a vector can be resolved ?
Infinite.
Infinite.
See lessState the essential condition for the addition of vectors.
They must represent the physical quantities of same nature.
They must represent the physical quantities of same nature.
See lessWrite an example of zero vector
The velocity vectors of a stationary object is a zero vectors.
The velocity vectors of a stationary object is a zero vectors.
See lessA projectile is fired with Kinetic energy 1 KJ. If the range is maximum, what is its Kinetic energy, at the highest point ? Ans: here 1/2 mv²=1 KJ = 1000j, θ=45°
At the highest Point, K. E.= 1/2 m(v cos θ)²= mv²/4 = 1000/2 = 500J
At the highest Point, K. E.= 1/2 m(v cos θ)²= mv²/4 = 1000/2 = 500J
See lessIf the instantaneous velocity of a particle is zero, will its instantaneous acceleration be necessarily zero ?
No. (highest point of vertical upward motion under gravity)
No. (highest point of vertical upward motion under gravity)
See lessWill the displacement of a particle change on changing the position of origin of the coordinate system ?
will not change.
will not change.
See lessWhich of the two-linear velocity or the linear acceleration gives the direction of motion of a body ?
Linear velocity
Linear velocity
See lessA car moving with velocity of 50 kmh⁻¹ on a straight road is ahead of a jeep moving with velocity 75 kmh⁻¹ . How would the relative velocity be altered if jeep is ahead of car ?
No change
No change
See less