General Gravity Problem

Q. A man drops a ball downside from the roof of a tower of height 400 meters. At the same time another ball is thrown upside with a velocity $50\frac{meter}{sec}$. from the bottom of the tower, then they will meet at which height from the bottom of the tower

1. 100 meters
2. 320 meters
3. 80 meters
4. 240 meters

Q.

A stone is dropped into water from a bridge 44.1 m above the water. Another stone is thrown vertically downward 1 sec later. Both strike the water simultaneously. What was the initial speed of the second stone?

1. 12.25 m/s

2. 14.75 m/s

3. 16.23 m/s

4. 17.15 m/s

Q.

A balloon is at a height of 81 m and is ascending upwards with a velocity of $12\frac{m}{s}$. A body of 2kg weight is dropped from it. If $g=10\frac{m}{s^2}$, the body will reach the surface of the earth in

A. 4.025 s

B. 5.4 s

C. 6.75 s

D. 1.5 s

Q. If a ball is thrown vertically upwards with speed u, the distance covered during the last t seconds of its ascent is

1. 
   $\frac{1}{2}g{t}^2$
2. 
   $ut-\frac{1}{2}g{t}^2$
3. $(u-gt)t$
4. $utd$

Q.

A ball is thrown up from the top of a tower at 20 m/s velocity. It took the ball 6 sec to fall to the bottom. How high is the tower?

1. 20 m

2. 40 m

3. 30 m

4. 60 m

Q. A ball is dropped on the floor from a height of 10 m. It rebounds to a height of 2.5 m. If the ball is in contact with the floor for 0.01 sec, the average acceleration during contact is

1. 
2. 
3. 
4. 

Q. A man drops a ball downside from the roof of a tower of height 400 meters. At the same time another ball is thrown upside with a velocity $50\frac{meter}{sec}$. from the surface of the tower, then they will meet at which height from the surface of the tower

1. 100 meters
2. 320 meters
3. 80 meters
4. 200 meters

Q. A frictionless wire AB is fixed on a sphere of radius R. A very small spherical ball slips on this wire. The time taken by this ball to slip from A to B is

1. 
2. 
3. 
4. 

Q. A stone dropped from a building of height h and it reaches after t seconds on earth. From the same building if two stones are thrown (one upwards and other downwards) with the same velocity u and they reach the earth surface after $t_1$ and$t_2$ seconds respectively, then

1. 
2. t = t₁ - t₂
3. 
4. 

Q. A parachutist after bailing out falls 50 m without friction. When parachute opens, it decelerates at $2\frac{m}{s^2}$. He reaches the ground with a speed of $3\frac{m}{s}$. At what height, did he bail out ?

1. 293 m
2. 111 m
3. 91 m
4. 182 m