Why do we use an electromagnet?
2 answers:
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Answer:
<h2>4 m/s</h2>Explanation:
The speed of the ball can be found by using the formula
p is the momentum
m is the mass
From the question we have
We have the final answer as
<h3>4 m/s</h3>Hope this helps you
Answer:
the work done by gravity on the boy is 604.62 J
Explanation:
Given;
distance the boy slides, d = 3 m
angle of inclination of the playground, θ = 40⁰
mass of the boy, m = 32 kg
The vertical height, h, above the ground through which the boy falls represents the height of the triangle which is the opposite side.
The distance through which the boy slides, d, represents the hypotenuse side of the right triangle.
The work done by gravity on the boy is calculated as;
W = P.E = mgh
= 32kg x 9.8m/s² x 1.928m
= 604.62 J
Therefore, the work done by gravity on the boy is 604.62 J