Practice questions Flashcards
1
Q
Draw a free body diagram for a 2kg sugar packet. Hint: (use formula for weight)
A
F-normal= 39.2N
Fg=-19.6N
2
Q
You place a 4.0kg watermelon on a spring scale that measures in newtons. What is the scale’s reading?
A
+39.2N
3
Q
You place a 22.50-kg television on a spring scale. If the scale reads 235.2N. What is the gravitational field?
A
10.45m/s2
4
Q
A 0.50-kg guinea pig is lifted up from the ground. What is the smallest force needed to lift it?
A
4.9N
5
Q
Find F-scale if: Fnet is 10N, Fg is 50N
A
60N
6
Q
For a lift going up, how will the Fnet be?
A
+Fnet= Fscale - Fg
7
Q
For a lift going down, how will the Fnet be?
A
-Fnet= Fscale - Fg
8
Q
If mass is 2 kg, and acceleration is positive 2 m/s. Find Fg, Fnet, Fscale
A
Fscale= 23.6N
Fnet= +4N
Fg= 19.6N
9
Q
A
