# Worksheet: Applications on Motion with Uniform Acceleration

In this worksheet, we will practice solving problems involving motion of a particle with uniform acceleration through one or more sections of its path.

**Q4: **

A man was driving his car in a straight line at 78 km/h when he pressed the brakes. If the carβs velocity decreased at a constant rate until it stopped completely over a period of 15 seconds, determine the stopping distance of the car.

**Q5: **

A bullet was fired horizontally at 104 m/s into a vertical wall 10 cm thick. Given that it passed all the way through, and its exit velocity was 96 m/s, what was the magnitude of its deceleration which resulted from passing through the wall? If the bullet was fired with the same velocity into a similar vertical wall with the same resistance, how far would it penetrate before it came to a stop?

- A , 135.2 cm
- B , 135.2 cm
- C , 67.6 cm
- D , 67.6 cm

**Q6: **

A bullet was fired horizontally at a wooden block. It entered the block at 80 m/s and penetrated 32 cm into the block before it stopped. Assuming that its acceleration was uniform, find . If, under similar conditions, another bullet was fired at the wooden block that was 14 cm thick, determine the velocity at which the bullet exited the wooden block.

- A ,
- B ,
- C ,
- D ,

**Q7: **

A train, starting from rest, began moving in a straight line between two stations. For the first 80 seconds, it moved with a constant acceleration . Then it continued to move at the velocity it had acquired for a further 65 seconds. Finally, it decelerated with a rate of until it came to rest. Given that the distance between the two stations was 8.9 km, find the magnitude of and the velocity at which it moved during the middle leg of the journey.

- A ,
- B ,
- C ,
- D ,

**Q8: **

A train was moving in a straight line between two stations 1,400 meters apart.
It started moving from the first station by accelerating for 4 seconds at a rate of 1 m/s^{2}.
It then maintained its velocity until it decelerated uniformly over the last 50 meters to come to a stop at the final station. Find the time taken to travel between the two stations.

**Q9: **

A lift started to go up after resting at the bottom of a mine. It covered a
distance of 479 m with an acceleration of
2.25 m/s^{2},
then it moved with a uniform velocity for a distance of 720 m and finally with a uniform deceleration for a distance of
549 m until it reached the surface of the
ground. Find the time the lift took from the bottom of the mine to reach
the surface of the ground approximated to the nearest two decimal places, if needed.

**Q10: **

A body was moving in a straight line at a constant speed of
24 cm/s.
3 seconds
after passing a certain point, another body started moving in the same
direction from that point with an initial velocity of
18 cm/s
and a uniform acceleration of 6 cm/s^{2}.
Find the time taken, in
seconds,
for the second body to catch up to the first.

**Q11: **

A small ball was moving in a straight line with a uniform velocity of
36 cm/s.
3 seconds
after it passed a certain point,
another ball started moving in the same direction with an initial velocity of
15 cm/s
and a uniform acceleration of
5 cm/s^{2}.
Find the distance at which the two balls impact from the same starting point,
and determine the velocity of the second ball just before the impact.

- A ,
- B ,
- C ,
- D ,

**Q12: **

A speeding car, moving at 96 km/h, passed by a police car. 12 seconds later, the police car started pursuing it. Accelerating uniformly, the police car covered a distance of 134 m until its velocity was 114 km/h. Maintaining this speed, it continued until it caught up with the speeding car. Find the time it took for the police car to catch the other car starting from the point the police car began moving.

**Q13: **

Two cars, and , were moving toward each other on the
same horizontal straight road. Car started from rest and accelerated
uniformly at 3 m/s^{2}, while car moved at a constant
speed of 72 km/h. When the cars met, the relative velocity of car
with respect to car was
180 km/h. Find the time the cars traveled to meet.

**Q14: **

A body, starting from rest, accelerated over 218 m until
its velocity reached 72 km/h. After that it
stopped accelerating and continued moving at this velocity for a further 44 m. Finally, it decelerated at a constant rate of 1 m/s^{2} until it stopped. Find the average velocity of
the body during the whole trip.

**Q15: **

A particle initially at rest starts to move in a straight line with constant acceleration. When it has covered 350 m, its speed is 8 m/s. It covers another 797 m at this speed before slowing down with uniform retardation, coming to rest after traveling a further 192 m. Find , the total time taken, and determine , the average velocity for the whole journey. Give your answers correct to two decimal places.

- A ,
- B ,
- C ,
- D ,

**Q16: **

A child was practicing riding a bicycle. As a result of his father pushing him,
he accelerated at a rate of 1.5 m/s^{2}
for 2 seconds. Following this, he continued
riding the bicycle at the speed he had gained for another 4 seconds. Find the
distance that the child covered.

**Q17: **

A car, moving in a straight line at 72 km/h, passed a police car at rest. 18 seconds later, the police car began pursuing it. Accelerating uniformly, it attained a velocity of 102 km/h over 102 m. Continuing at this velocity, it pursued the car until it caught up. How far did the first car travel before the police car caught up with it?

**Q18: **

A body, moving in a straight line, covered 60 cm in 6 seconds whilst accelerating uniformly. Maintaining its velocity, it covered a further 52 cm in 5 seconds. Finally, it started decelerating at a rate double to the rate of its former acceleration until it came to rest. Find the total distance covered by the body.

**Q19: **

A body, moving in a straight line at
2 m/s,
started accelerating uniformly at
7 m/s^{2}
over a distance of 18 m.
Then, maintaining this velocity, it covered a further
44 m.
Find the time (in seconds) it took for the body to cover this distance and the distance
covered by the body during its second
of movement.

- A ,
- B ,
- C ,
- D ,

**Q20: **

A body started moving from rest with a steady acceleration of 0.1 m/s^{2}.
When its velocity reached 138 cm/s,
it decelerated until it came to rest again 23 seconds after it started moving. Calculate the deceleration and the total distance covered by the body.

- A ,
- B ,
- C ,
- D ,

**Q22: **

A body was projected vertically upwards at 12.74 m/s from the top of a tower. Find the time taken for the body to return to the point of projection. Consider the acceleration due to gravity to be .

**Q23: **

A body, moving in a straight line with a uniform acceleration of 2 m/s^{2}, covered 136 m before
it stopped accelerating. It continued to move at the velocity it had acquired for a further
27 seconds. Given that the total distance covered by
the body was 1,162 m, find its initial velocity.

**Q24: **

A particle, starting from rest, began moving in a straight line. It covered a distance of 125 m
while accelerating uniformly at a rate of 10 m/s^{2}.
Then, maintaining the velocity that it had gained, it covered a distance of 479 m.
Finally, it decelerated uniformly at a rate of 5 m/s^{2}
until it came to rest. How long was the particle moving for?

**Q25: **

A body started moving in a straight line from rest. Accelerating uniformly, it covered 450 m until its speed became 50 m/s. Continuing at this velocity, it covered a further 500 m. Finally, it decelerated uniformly over 200 m until it came to rest. Find the acceleration of the body over its final 200 m and the time taken to cover the whole distance.

- A ,
- B ,
- C ,
- D ,