An object is thrown vertically upward with a velocity of 20 m/s. How much time it will take to reach the highest point?
Correct answer: A. 2 sec
- A. 2 sec
- B. 4 sec
- C. 1 sec
- D. Insufficient information
Explanation
The body is thrown vertically upwards with velocity of 20 m/s , it means initial velocity is 20 m/s. And if it is thrown upwards it will come to rest, So, final velocity is 0 m/s. The gravitational force is applied in the opposite direction of motion, so we will take acceleration as - 10 m/s². Using first equation of motion:
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About Force and Motion
Displacement, velocity and acceleration describe motion, including the horizontal and vertical components of projectile motion. The chapter connects these quantities with Newton's laws, momentum and impulse, then applies conservation of momentum to collisions, distinguishing elastic collisions from inelastic ones.
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