1.25 m
2.50 m
3.75 m
5.00 m
m1: m2 : m3
m1 : 2m2 : 3m3
1 : 1 : 1
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 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
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 body dropped from top of a tower fall through 40 m during the last two seconds of its fall. The height of tower is (g = 10m/s2)
60 m
45 m
80 m
50 m
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
The ratios of the distance covered by a freely falling particle, starting from rest in the first, second, third ... nth seconds of its motion
Form the series corresponding to the squares of the first n natural numbers
Form an A.P.
Form a series corresponding to the difference of the squares of the successive natural numbers
Both choices (b) and (c) are correct
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
160 m
Zero
