A particle is moving along the positive x -axis as x = a t - 3 + b t - 3 2 + 4 t - 3 , which of the following is true?

The acceleration of the particle is 2 b

The initial velocity of the particle is a - 2 b + 4

The particle is at origin at t = 4

The acceleration of particle is 6 b

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A projectile is fired at an angle of $45 °$ and reaches the highest point in its path after $2 \sqrt{2}$ s. Find the velocity of projectile in $m / s$ .

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Important Questions on Kinematics

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Physics Crash Course NEET>Chapter 2 - Kinematics>Level 1>Q 26

A bomb is dropped by a fighter plane flying horizontally. To an observer sitting in the plane, the trajectory of the bomb is a :

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Physics Crash Course NEET>Chapter 2 - Kinematics>Level 1>Q 27

A boy sitting on the topmost berth in the compartment of a train which is just going to stop on a railway station drops an apple aiming at the open hand of his brother sitting vertically below his hands at a distance of about

2 m

. The apple will fall

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Physics Crash Course NEET>Chapter 2 - Kinematics>Level 1>Q 28

A train is standing on a platform and a man inside a compartment of the train drops a stone. At the same instant, the train starts to move with constant acceleration. The path of the particle as seen by the person who drops the stone is

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Physics Crash Course NEET>Chapter 2 - Kinematics>Level 1>Q 29

The figure shown below represents the velocity-time graphs of the two particles $P_{1}$ and $P_{2}$ moving along a straight line. The magnitude of their relative velocity

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Physics Crash Course NEET>Chapter 2 - Kinematics>Level 1>Q 30

The distance between two particles is decreasing at a rate of

6 m s^{- 1}

. If these particles travel with same speeds and in the same direction, then the separation increases at the rate of

4 m s^{- 1}

. The particles have speeds as

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Physics Crash Course NEET>Chapter 2 - Kinematics>Level 1>Q 31

In the climax of a movie, the hero jumps from a helicopter, and the villain, chasing the hero, also jumps from the same level. After some time, when they come at the same horizontal level, the villain fires a bullet horizontally towards the hero. Both were falling with a constant acceleration of

2 m s^{- 2}

, because of a parachute. Assuming the hero to be within the range of the bullet, which of the following is correct?

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Physics Crash Course NEET>Chapter 2 - Kinematics>Level 1>Q 32

A jogger running at

9 km h^{- 1}

alongside a railway track is

240

metres ahead of the engine of a

120

metre long train running at

45 km h^{- 1}

in the same direction. In how much time will the train pass the jogger?

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Physics Crash Course NEET>Chapter 2 - Kinematics>Level 1>Q 33

Two cars

A

and

B

are moving such that

A

has a speed of

40 km h^{- 1}

towards east and

B

a speed of

40 km h^{- 1}

towards north. If the initial separation between them is

2 km

, what is the minimum distance between the cars?

A projectile is fired at an angle of 45° and reaches the highest point in its path after 22 s. Find the velocity of projectile in m/s.

Important Questions on Kinematics

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A projectile is fired at an angle of $45 °$ and reaches the highest point in its path after $2 \sqrt{2}$ s. Find the velocity of projectile in $m / s$ .