Zero
If a car at rest accelerates uniformly to a speed of 144 km/h in 20 s, it covers a distance of
2880 m
1440 m
400 m
20 m
An athlete completes one round of a circular track of radius r in 40 seconds. What will be his displacement at the end of 2 min and 20 seconds?
zero
2 R
2 π R
7 π R
A car covers the first – half of the distance between two places at 40 km/h and other half at 60km/h. The average speed of the car is
40 km/h
48 km/h
50 km/h
60 km/h
A car travels for half of its time at 80 km/h and for the rest half time at 40 km/h. Total distance covered is 60 km. What is the average speed of the car?
80 km/h
120 km/h
180 km/h
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
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)
40 m
80 m
160 m
A train of 150 m length is going towards north direction at a speed of 10m/s. A parrot flies at the speed of 5 m/s towards south direction parallel to the railways track.The time taken by the parrot to cross the train is
12 s
8 s
15 s
10 s
1.25 m
2.50 m
3.75 m
5.00 m
zero acceleration
