HELPPPP PLZ URGENT

Question

Use any of the following equations to solve the problems. Show all work

FN = mg W = mg gEARTH = 9.8 m/s2 

1. What is the Normal Force supplied by a desk to a 2 kg book?

2. What is the mass of a person that Weighs 85 N ?

3. At the surface of Venus, gravity is 8.9 m/s2. A robot has a mass of 10kg on Venus.

(a) Find it’s weight on Venus.

(b) State its mass on Earth.

(c) Calculate its weight on Earth.

Answer 1

Mimi,

look at the equations given as they have the solutions

1) Normal force is FN = mg; 5•9.8= 49N

2) W=mg, so m=W/g; 85/9.8= 8.7kg

3) W_venus = mg_venus = 10 • 8.9 = 89N

[b] mass always constant as a measure of amount of matter in an object so 10kg

[c] W = mg = 10 • 9.8= 98N