A ball is thrown upward with a certain speed. It passes through the same point at 3 second and 7 second from the start. The maximum height achieved by the ball is

1. 500 m

2. 250 m

3. 125 m

4. 450 m

Concept Questions :-

Uniformly accelerated motion

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For the following acceleration versus time graph the corresponding velocity versus displacement graph is

1.

2.

3.

4.

Concept Questions :-

Uniformly accelerated motion

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A stone falls freely from rest from a height h and it travels a distance $\frac{9h}{25}$ in the last second. The value of h is:

1. 145 m

2. 100 m

3. 122.5 m

4. 200 ms

Concept Questions :-

Uniformly accelerated motion

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A particle is thrown upwards from ground. It experiences a constant resistance force which can produce retardation of 2 $m/{s}^{2}$. The ratio of time of ascent to the time of descent is: $[g=10m/{s}^{2}]$

(1) 1:1

(2) $\sqrt{\frac{2}{3}}$

(3) $\frac{2}{3}$

(4) $\sqrt{\frac{3}{2}}$

Concept Questions :-

Uniformly accelerated motion

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A bullet loses $\frac{1}{20}$ of its velocity passing through a plank. The least number of planks required to stop the bullet is (All planks offers same retardation)

(1) 10

(2) 11

(3) 12

(4) 23

Concept Questions :-

Uniformly accelerated motion

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A point moves with uniform acceleration and *v*_{1}, *v*_{2} and *v*_{3} denote the average velocities in the three successive intervals of time *t*_{1}, *t*_{2} and *t*_{3}. Which of the following relations is correct ?

(1) $({v}_{1}-{v}_{2}):({v}_{2}-{v}_{3})=({t}_{1}-{t}_{2}):({t}_{2}+{t}_{3})$

(2) $({v}_{1}-{v}_{2}):({v}_{2}-{v}_{3})=({t}_{1}+{t}_{2}):({t}_{2}+{t}_{3})$

(3) $({v}_{1}-{v}_{2}):({v}_{2}-{v}_{3})=({t}_{1}-{t}_{2}):({t}_{1}-{t}_{3})$

(4) $({v}_{1}-{v}_{2}):({v}_{2}-{v}_{3})=({t}_{1}-{t}_{2}):({t}_{2}-{t}_{3})$

Concept Questions :-

Uniformly accelerated motion

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The initial velocity of the particle is 10 m/sec and its retardation is 2 m/sec^{2}. The distance moved by the particle in 5^{th} second of its motion is

(1) 1 m

(2) 19 m

(3) 50 m

(4) 75 m

PMT - 1976

Concept Questions :-

Uniformly accelerated motion

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A motor car moving with a uniform speed of 20 m/sec comes to stop on the application of brakes after travelling a distance of 10 m Its acceleration is

(1) 20 *m*/*sec*^{2}

(2) –20 *m*/*sec*^{2}

(3) –40 *m*/*sec*^{2}

(4) +2 *m*/*sec*^{2}

Concept Questions :-

Uniformly accelerated motion

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The velocity of a body moving with a uniform acceleration of 2 m/sec^{2} is 10 m/sec. Its velocity after an interval of 4 *sec* is

(1) 12 m/sec

(2) 14 m/sec

(3) 16 m/sec

(4) 18 m/sec

Concept Questions :-

Uniformly accelerated motion

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A particle starting from rest moving with constant acceleration travels a distance *x* in first 2 *seconds *and a distance *y* in next two *seconds*, then ** **

(1) *y* = *x*

(2) *y* = 2*x*

(3) *y* = 3*x*

(4) *y* = 4*x*

Concept Questions :-

Uniformly accelerated motion

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Difficulty Level: