Question

A body is dropped from the certain height and it streaks the ground after 20 sec. Calculate the velocity in which it streaks the ground.


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Answer 1

Provided that:

• Initial velocity = 0 mps
• Time = 20 sec
• g = + 10 mps sq.

To calculate:

• Final velocity

Solution:

• Final velocity = 200 mps

Using concept:

• First equation of motion

Using formula:

• v = u + at

Where, a denotes acceleration, u denotes initial velocity, v denotes final velocity and t denotes time taken.

→ v = u + at

→ v = 0 + 10(20)

→ v = 0 + 200

→ v = 200 mps

→ Final velocity = 200 mps