(a) A steel ball of mass 0.2 kg is projected vertically upwards, from the top of a building 100m high, with an initial velocity of 40 m.s. Ignore air frietion and calculate:i. the total mechanical energy of the ball the time it was projected.ii. the total mechanical energy of the ball the time it reached the ground level (i.e at thebottom of the building)-1iii. the total mechanical energy of the ball the time it reaches its maximum height abovethe ground.iv. the velocity of the ball the time it reached the ground levelv. time taken by the ball to reach the ground level from the time it was projectedvi. the maximum height above the ground the ball reachedvii. the velocity of the ball the time it was 20 m above the ground(b) Two objects of mass 12 kg and 8 kg respectively move towards each other at velocities10 m.s and 5 m.s respectively. If the objects unite during collision, calculate theresultant velocity.Page 5

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Description: (a) A steel ball of mass 0.2 kg is projected vertically upwards, from the top of a building 100m high, with an initial velocity of 40 m.s. Ignore air frietion and calculate:i. the total mechanical energy of the ball the time it was projected.ii. the

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(a) A steel ball of mass 0.2 kg is projected vertically upwards, from the top of a building 100 m high, with an initial velocity of 40 m.s. Ignore air friction and calculate: i. the total mechanical energy of the ball the time it was projected. ii. the total mechanical energy of the ball the time it reached the ground level (i.e at the bottom of the building) iii. the total mechanical energy of the ball the time it reaches its maximum height above the ground.

(a) A steel ball of mass 0.2 kg is projected vertically upwards, from the top of a building 100 m high, with an initial velocity of 40 m.s. Ignore air friction and calculate: i. the total mechanical energy of the ball the time it was projected. ii. the total mechanical energy of the ball the time it reached the ground level (i.e at the bottom of the building) iii. the total mechanical energy of the ball the time it reaches its maximum height above the ground.

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Question

(a) A steel ball of mass 0.2 kg is projected vertically upwards, from the top of a building 100
m high, with an initial velocity of 40 m.s. Ignore air frietion and calculate:
i. the total mechanical energy of the ball the time it was projected.
ii. the total mechanical energy of the ball the time it reached the ground level (i.e at the
bottom of the building)
-1
iii. the total mechanical energy of the ball the time it reaches its maximum height above
the ground.
iv. the velocity of the ball the time it reached the ground level
v. time taken by the ball to reach the ground level from the time it was projected
vi. the maximum height above the ground the ball reached
vii. the velocity of the ball the time it was 20 m above the ground
(b) Two objects of mass 12 kg and 8 kg respectively move towards each other at velocities
10 m.s and 5 m.s respectively. If the objects unite during collision, calculate the
resultant velocity.
Page 5

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