NEET Physics Kinematics MCQs Set E

Q.5 Assertion : Retardation is directlyopposite to the velocity. 

      Reason : Retardation is equal to the time rate of decrease of speed.

(1) If both assertion and reason are true and reason is the correct explanation of assertion

(2) If both assertion and reason are true but reason is not the correct explanation of assertion.

(3) If assertion is true but reason is false

(4) If assertion is false but reason is true

Q.6 A particle starts from rest, accelerates at 2 m/s² for 10 s and then goes with constant speed for 30 s and then decelerates at 4 m/s² till it stops. What is the distance travelled by it :

(1) 750 m

(2) 800 m

(3) 700 m

(4) 850 m

Q.15 The displacement of a particle, starting fromrest (at t = 0) is given by
s = 6t² – t³

The time in seconds at which the particle will attain zero velocity again is 
(1) 2 (2) 4 (3) 6 (4) 8

Q.16 The graph shows the variation of velocity of a rocket with time.The time of burning of fuel from the graph is

(1) 10 s
(2) 110 s
(3) 120 s
(4) Data insufficient

Q.17 Two projectiles are fired from the same point with the same speed at angles of projection 60° and 30° respectively.Which one of the following is true:– 

(1) Their horizontal range will be the same

(2) Theirmaximumheight will be the same

(3) Their landing velocitywill be the same

(4) Their time of flight will be the same

Q.18 A man is at a distance of 6 m from a bus. The bus begins to move with a constant acceleration of 3ms^–2. In order to catch the bus, the minimum speed with which the man should run towards the bus is

(1) 2 ms^–1
(2) 4 ms^–1
(3) 6 ms^–1
(4) 8 ms^–1

Q.19 A ball is dropped from the top of a building 100m high.At the same instant another ball is thrown upwards with a velocity of 40m/s from the bottom of the building.The two balls will meet after

(1) 3 s
(2) 2 s
(3) 2.5 s
(4) 5 s