Practice questions

Question 1

Draw a free body diagram for a 2kg sugar packet. Hint: (use formula for weight)

Answer 1

F-normal= 39.2N
Fg=-19.6N

Question 2

You place a 4.0kg watermelon on a spring scale that measures in newtons. What is the scale’s reading?

Answer 2

+39.2N

Question 3

You place a 22.50-kg television on a spring scale. If the scale reads 235.2N. What is the gravitational field?

Answer 3

10.45m/s2

Question 4

A 0.50-kg guinea pig is lifted up from the ground. What is the smallest force needed to lift it?

Answer 4

4.9N

Question 5

Find F-scale if: Fnet is 10N, Fg is 50N

Answer 5

60N

Question 6

For a lift going up, how will the Fnet be?

Answer 6

+Fnet= Fscale - Fg

Question 7

For a lift going down, how will the Fnet be?

Answer 7

-Fnet= Fscale - Fg

Question 8

If mass is 2 kg, and acceleration is positive 2 m/s. Find Fg, Fnet, Fscale

Answer 8

Fscale= 23.6N
Fnet= +4N
Fg= 19.6N