A car moves a distance of 200 m. It covers the first-half of the distance at speed v. The average speed is 48 km/h. Find the value of v.
56 km/h
60 km/h
50 km/h
48 km/h
One train A 120 m long is moving in a direction with a speed of 20 m/s. Another train B 130 m long is moving with a speed of 30 m/s in the opposite direction. The train B crosses the train A in a time
5 s
36 s
38 s
10 s
A ball P is dropped vertically and another ball Q is thrown horizontally from the same height and at the same time. If air resistance is neglected, then,
Ball P reaches the ground first
Ball Q reaches the ground first
Both the balls reach the ground at the same time
Respective masses of the two balls will decide the time
A body is thrown vertically upwards from the ground. It reaches a maximum height of 20 m in 5s. After what time it will reach the ground from its maximum height position?
2.5 s
25 s
A body falling from rest describes distances S1, S2 and S3 in the first, second and third seconds of its fall. The ratio of S1 : S2 : S3 is
1 : 2 : 3
1 : 3 : 5
1 : 1 : 1
1 : 4 : 9
zero acceleration
A car is moving along a straight road with a uniform acceleration. It passes through two points P and Q separated by a distance with velocity 30 km/h and 40 km/h respectively. The velocity of the car midway between P and Q is
33.3 km/h
20 √2 km/h
25 √2 km/h
0.35 km/h
1.25 m
2.50 m
3.75 m
5.00 m
What will be ratio of the distance moved by a freely falling body from rest in 4th and 5th seconds of journey?
4 : 5
7 : 9
16 : 25
1 : 1
A stone released with zero velocity from the top of a tower, reaches the ground in 4 s. The height of the tower is ( g = 10m/s2)
20 m
40 m
80 m
160 m
