A body is thrown vertically upwards. If the air resistance is to be taken into account, then the time during which the body rises is: 

1.	Equal to the time of fall.
2.	Less than the time of fall.
3.	Greater than the time of fall.
4.	Twice the time of fall.

A body is released from a great height and falls freely towards the earth. Another body is released from the same height exactly one second later. The separation between the two bodies, two seconds after the release of the second body is 

(1) 4.9 m

(2) 9.8 m

(3) 19.6 m

(4) 24.5 m

An object is projected upwards with a velocity of 100 m/s. It will strike the ground after (approximately) 

(1) 10 sec

(2) 20 sec

(3) 15 sec

(4) 5 sec

A stone dropped from the top of the tower touches the ground in 4 sec. The height of the tower is about 

(1) 80 m

(2) 40 m

(3) 20 m

(4) 160 m

A body is released from the top of a tower of height h. It takes t sec to reach the ground. Where will be the ball after time t/2 sec 

(1) At h/2 from the ground

(2) At h/4 from the ground

(3) Depends upon mass and volume of the body

(4) At 3h/4 from the ground

A particle is projected up with an initial velocity of $80ft/\sec$. The ball will be at a height of $96ft$ from the ground after (Given $g= 32 ft/s^2$ )

(1) 2.0 and 3.0 sec

(2) Only at 3.0 sec

(3) Only at 2.0 sec

(4) After 1 and 2 sec

A body falls from rest, its velocity at the end of first second is $(g=32ft/{\sec }^2)$ 

(1) $16ft/\sec$

(2) $\text{32\hspace{0.17em}\hspace{0.17em}}ft/\sec$

(3) $64ft/\sec$

(4) $24ft/\sec$ 

A stone thrown upward with a speed u from the top of the tower reaches the ground with a velocity 3u. The height of the tower is  

(1) $3u^2/g$

(2) $4u^2/g$

(3) $6u^2/g$

(4) $9u^2/g$

Two stones of different masses are dropped simultaneously from the top of a building 

(1) Smaller stone hit the ground earlier

(2) Larger stone hit the ground earlier

(3) Both stones reach the ground simultaneously

(4) Which of the stones reach the ground earlier depends on the composition of the stone

A body was thrown up with an initial speed of $96ft/\sec$ reaches the ground after: $(g=32ft/{\sec }^2)$ 

(1) 3 sec

(2) 6 sec

(3) 12 sec

(4) 8 sec