1. The velocity of a bullet is reduced from 200m/s to 100m/s while travelling through a wooden block of thickness 10cm. The retardation, assuming it to be uniform, will be

a) \[10\times 10^{4}m\diagup s^{2}\]

b) \[12\times 10^{4}m\diagup s^{2}\]

c) \[13.5\times 10^{4}m\diagup s^{2}\]

d) \[15\times 10^{4}m\diagup s^{2}\]

Explanation:

2. A body of 5 kg is moving with a velocity of 20 m/s. If a force of 100N is applied on it for 10s in the same direction as its velocity, what will now
be the velocity of the body

a) 200 m/s

b) 220 m/s

c) 240 m/s

d) 260 m/s

Explanation:

3. A particle starts from rest, accelerates at \[2 m\diagup s^{2}\] for 10s and then goes for constant speed for 30s
and then decelerates at \[4 m\diagup s^{2}\] till it stops. What is the distance travelled by it

a) 750 m

b) 800 m

c) 700 m

d) 850 m

Explanation:

4. The engine of a motorcycle can produce a maximum acceleration \[5 m\diagup s^{2}\]. Its brakes can produce a maximum retardation 10 m/s^{2}. What is
the minimum time in which it can cover a distance of 1.5 km

a) 30 sec

b) 15 sec

c) 10 sec

d) 5 sec

Explanation:

5. The path of a particle moving under the influence of a force fixed in magnitude and direction is

a) Straight line

b) Circle

c) Parabola

d) Ellipse

Explanation: Straight line

6. A car, moving with a speed of 50 km/hr, can be stopped by brakes after at least 6m. If the same car is moving at a speed of 100 km/hr, the minimum stopping distance is

a) 6m

b) 12m

c) 18m

d) 24m

Explanation:

7. A student is standing at a distance of 50metres from the bus. As soon as the bus begins its motion with an acceleration of \[1 m\diagup s^{2}\], the student starts
running towards the bus with a uniform velocity u . Assuming the motion to be along a straight road, the minimum value of u , so that the student is able to catch the bus is

a) \[5 m s^{-1}\]

b) \[8 m s^{-1}\]

c) \[10 m s^{-1}\]

d) \[12 m s^{-1}\]

Explanation:

8. A body A moves with a uniform acceleration a and zero initial velocity. Another body B, starts from the same point moves in the same direction
with a constant velocity v . The two bodies meet after a time t . The value of t is

a) \[\frac{2v}{a}\]

b) \[\frac{v}{a}\]

c) \[\frac{v}{2a}\]

d) \[\sqrt{\frac{v}{2a}}\]

Explanation:

9. A particle moves along X-axis in such a way that its coordinate X varies with time t according to the equation \[x=\left(2-5t+6t^{2}\right)m \] . The initial velocity of the particle is

a) \[-5m \diagup s\]

b) \[6m \diagup s\]

c) \[-3m \diagup s\]

d) \[3m \diagup s\]

Explanation:

10. A car starts from rest and moves with uniform acceleration a on a straight road from time t = 0 to t = T. After that, a constant deceleration brings
it to rest. In this process the average speed of the car is

a) \[\frac{aT}{4}\]

b) \[\frac{3aT}{2}\]

c) \[\frac{aT}{2}\]

d) aT

Explanation: