Problems

A bicycle accelerates at 1 m / s ^ 2 from an initial velocity of 4 m / s for 10 s. Find the distance moved by it during this interval of time.

• 190 m

• 910 m

• 9 m

• 90 m

A train slows down from 80 km / h with a uniform retardation of 2 m / s ^ 2. How long will it take to attain a speed of 20 km / h ?

• - 8.3 s

• 8.3 s

• 16.6 s

• 20 s

A car travels with a velocity of 5 m/s. It then accelerates uniformly and travels a distance of 50 m. If the velocity reached is 15 m/s. Find the acceleration and the time to travel this distance.

• 2 m/s ^2 and 15 sec

• 12 m/s ^2 and 15 sec

• 2 m/s ^2 and 5 sec

• 20 m/s ^2 and 5 sec

A train starts from rest. It moves through 1 km in 100 s with uniform acceleration. What will be its speed at the end of 100 s.

• 12 m / s ^ 2

• 20 m / s

• 102 m / s

• 120 m / s

A car has a velocity of 10 m / s. It accelerates at

0.2 m/s ^2 for half a minute. Find the distance traveled during this time and the final velocity of the car.

• Vf = 16 m / s and S = 390 m

• Vf = 16 m / s and S = 490 m

• Vf = 16 m / s and S = 370 m

• Vf = 160 m / s and S = 390 m

A boy throws a ball vertically up. It returns to the ground after 5 seconds. Find

a)The maximum height reached by the ball.

b)The velocity with which the ball is thrown up.

• vi = 25 m / s and h = 60 m

• vi = 50 m / s and h = 60 m

• vi = 25 m / s and h = 31.25 m

• vi = 50 m / s and h = 31.25 m

A cricket ball is hit vertically upwards and returns to the ground 6 s later. Find

a)The maximum height reached by the ball.

b)The initial velocity of the ball.

• vi = 30 m / s and h = 30 m

• vi = 45 m / s and h = 30 m

• vi = 30 m / s and h = 45 m

• vi = 45 m / s and h = 45 m

A tennis ball is hit vertically upward with a velocity of 30 m / s. It takes 3 s to reach the highest point. Calculate the maximum height reached by the ball. How long it will take to return to ground ?

• h = 45 m and T = 2 sec

• h = 45 m and T = 6 sec

• h = 45 m and T = 3 sec

• h = 90 m and T = 3 sec

A stone is dropped from a height of 40 m. How much time will it take to reach the ground? With what velocity will it strike the ground?

• Vf = 2.828 m / s and t = 28.28 sec

• Vf = 282.8 m / s and t = 2.828 sec

• Vf = 2828 m / s and t = 2.828 sec

• Vf = 28.28 m / s and t = 2.828 sec

A stone is thrown vertically upward with a velocity of 20 m / s. Find the maximum height reached by the stone and total time of flight.

• T = 2 sec

• T = 4 sec

• T = 0.4 sec

• T = 0.2 sec