Question

Calculate pressure exert by an object consist of a square
shape where one side of the object is 3 m and force applied by
this object at Earth surface is 20N.

Answer 1

Answer:

You want to lift a heavy box. The force of gravity pulls it downwards with a force of 500 N. Your father applies an upward force of 220 N from below. How much force will you have to apply to lift it upwards?

(a) 220 N

(b) 280 N

(c) 300 N

(d) less than 220 N

ANSWER:

(b) 280 N

Force of gravity acting in the downward direction = 500 N

Force applied in the upward direction = 220 N

So, net force required to apply to lift the box up = 500 - 220

                                                                         = 280 N