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A vehicle travels half the distance with speed v and the remaining distance with speed 2v. Its average speed is
A.
B.
C.
D.
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- 1)
Given figure shows velocity-time graph of a ball of mass 250g rolling on a concretefloor. Compute the acceleration and the frictional force of the floor on the ball?
- 2)
What will be the ratio of distances moved by a freely falling body from rest in 4th and 5th seconds of journey
- 3)The velocity ( v)-time (t) plot of the motion of a body is shown below.
The acceleration ( a)- time (t) graph that best suits this motion is.
- 4)A small block slides down on a smooth inclined plane, starting from rest at time t = 0.
Let
be the distance travelled by the block in the interval t = n — 1 to t = n,
Then, the ratio
is:
- 5)The displacement-time graphs of two moving particles make angles of 30° and 45° with the x-axis as shown in the figure. The ratio of their respective velocity is
- 6)The ratio of the distances travelled by a freely falling body in the 1st, 2nd, 3rd and 4th second
- 7)A particle is moving such that its position coordinate (x, y) is
(2m, 3m) at time t = 0
(6m, 7m) at time t = 2 s and
(13m, 14m) at time t = 5s.
- 8)A vehicle travels half the distance with speed v and the remaining distance with speed 2v. Its average speed is
- 9)The x-t graph of a particle performing simple harmonic motion is shown in the figure. The acceleration of the particle at t=2 s is :
- 10)A car starts from rest and accelerates at 5 m/s². At t = 4s, a ball is dropped out of a window by a person sitting in the car. What is the velocity and acceleration of the ball at t = 6s? (Take g = 10 m/s²)
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