It takes me 12s to lift a box upward with 20 N of force to a height of 45m. What was my power output ?

75Watts

Explanation:

Given parameters:

Time  = 12s

Force applied  = 20N

Height  = 45m

Unknown:

Power output  = ?

Solution:

Power is defined as the rate at which work is done.

 It is mathematically expressed as;

        Power  =

Work done  = force x distance  = 20 x 45  = 900J

        Power  =   = 75Watts

the focus of lesson 1 is newton's first law of motion - sometimes referred to as the law of inertia. newton's first law of motion is often stated as. an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

explanation: