Question

# A ball of mass m is thrown up to height h in air with an initial velocity v,as shown.Air resisitance is considered negligible. The acceleration of free fall is g.what is the total work done by the gravitational force on the ball during its flight from P to Q? A
Zero
B
12mv2
C
mgh
D
2mgh
Solution
Verified by Toppr

#### A ball of mass =mHeight =h in airInitial velocity=VAir resistance is considered negligibleThe acceleration of free fall =gWork done by the gravitational force on the ball during its flight from P and QW=F×dWorkdone=Force×displacementSince displacementwill be 0 NowWork done W=0 1
Similar Questions
Q1

A ball of mass m is thrown vertically up with an initial velocity so as to reach a height h.The correct statement is :

(a) Potential energy of the ball at the ground is mgh.

(b) Kinetic energy of the ball at the ground is zero.

(c) Kinetic energy of the ball at the highest point is mgh.

(c) Potential energy of the ball at the highest point is mgh.

View Solution
Q2

What is the final velocity (v) and initial velocity (u) during each of these following situations: ( Please don't consider the gravitational force or the air)
​​​​​​1) A ball thrown vertically upwards at velocity of 6 m/s.
2) A ball thrown downwards at a velocity of 7 m/s.
3) A ball going vertically accelerating 4m/s.
4) A balloon which is in the air and releases a stone which takes a velocity 8 m/s to reach the ground ( find the u and v of the stone)

View Solution
Q3

A ball is thrown vertically upwards, it reaches the height h and then returns to the initial position. Work done by gravity when ball moves upwards is W1 and W2 when ball moves in downward direction. Then

View Solution
Q4

A ball is thrown upward with an initial velocity vo from the surface of the earth. The motion of the ball is affected by a drag force equal to mγv2 (where, m is mass of the ball, v is its instantaneous velocity and γ is a constant). Time taken by the ball to rise to its zenith (maximum height) is

View Solution
Q5

A ball is thrown upward with an initial velocity V0 from the surface of the earth. The motion of the ball is affected by a drag force equal to mγv2 (where m is mass of the ball, v is its instantaneous velocity and γ is a constant). Time is taken by the ball to rise to its zenith is:

View Solution
Solve
Guides