Motion Under Gravity

Q. A particle starting from rest travels a distance x in first 2 seconds and a distance y in next two seconds, then

1. 
2. 
3. 
4. 

Q. A particle is dropped under gravity from rest from a height $h(g=9.8\frac{m}{se{c}^2})$ and it travels a distance $\frac{9h}{25}$ in the last second, the height h is

1. 100 m
2. 167.5 m
3. 122.5 m
4. 145 m

Q.

Which at these can never represent a body in free fall?

1. 

2. 

3. 

4. 

Q.

If I dropped a ball near the surface of the moon, will it still fall in such a way that the ratio of thetotal distances it covers as it falls , after every second, is in the ratio 1:4:9 ?

1. YES

2. NO

Q.

I drop a ball from an aeroplane. If there was no air, will the ball still fall at a uniform acceleration ie. in ratios 1:4:9?

1. YES

2. NO

Q.

How long will the ball take to come back to the point from where it was thrown?

1. 1 sec

2. 9 sec

3. 8 sec

4. 10 sec

Q.

So it takes $\frac{u}{g}$secs to go up, how long will it take to come down?(as mentioned there is no air)

1. shorter than because in the previous case gravity is acting against velocity and here it is acting along the velocity

2. equal to

3. I don't know

4. longer than

Q.

How high does the ball go?

1. None of these

2. u²/2g

3. u²/g

4. 2u²/g

Q.

Given the speed-time graph of a golf ball shot from ground at t = 0.
What will be the time of flight?

1. 1s

2. 0.8s

3. 0.6s

4. 1.2s

Q.

A man in a balloon, throws a stone downwards with speed of 5 m/s with tespect ot balloon. The balloon is moving upwards with a constant acceleration of $5m/s^2$ . Then velocity of the stone relative to the man after 2 second is

1. 30 m/s

2. 15 m/s

3. 35 m/s

4. 10 m/s