Chapter 4 Newton’s First Law of Motion – Inertia Math Review Work Sheet
Name _________________________________________ Period ________
Draw diagrams and solve for the correct answers.
1. A 100-N lantern is suspended by a pair of ropes with 120 degrees between them (each
60 degrees from the vertical). The tension in each rope is?
2. What is the minimum resultant possible when adding a 5-N force to an 8 -N force?
3. A -N force and a -N force act on an object in opposite directions. What is the net force
on the object?
4. What is the maximum resultant possible when adding a 2-N force to an 8-N force?
5. A 5-N force and a 30-N force act in the same direction on an object. What is the net
force on the object?
6. If a woman has a mass of 50 kg, what is her weight in newtons?
7. Calculate in newtons the weight of a 2,000 kg elephant.
8. Calculate in newtons the weight of a 2.5 kg melon.
9. An apple weighs about 1 N. What is its mass in kilograms?
Chapter 4 Newton’s First Law of Motion – Inertia Math Review Work Sheet
10. Susie finds she weighs 300 N. Calculate her mass.
11. What is the minimum resultant possible when adding a 5-N force to an 8-N force?
12. The mass of a lamb that weighs 110 N is about?
13. How much does a 3.0-kg bag of weigh?
14. A book bag has a mass of 10.0 kilograms and a weight of?
15. An object weighs 30 N on Earth. A second object weighs 30 N on the moon. Which has
the greater mass?
16. What is the magnitude of the resultant of a 6.0-N force acting vertically upward and a
4.0-N force acting horizontally?
17. Two forces of 10 N both act on an object. The angle between the forces is 90°. What is
the magnitude of their resultant?
18. The following forces act on an object: 9 N north, 52 N south, and 55 N west. What is the
magnitude of the net force?
Chapter 4 Newton’s First Law of Motion – Inertia Math Review Work Sheet
19. How much (in newtons) does a 10.0-kg bag of footballs weigh?
20. A person weighs 650 N. What is the mass of the person?
21. How much (in newtons) does 0.60 kg of pepperoni weigh?
22. On the moon, the acceleration due to gravity is 1/6 that on Earth. What would be the
weight of 0.9 kg of on the moon?
23. On the surface of Jupiter, the acceleration due to gravity is 26 m/s2. How much would a
0.40-kg rock weigh on Jupiter?
24. How much would a 170-kg rock weigh on Jupiter?
25. Harry Heavyweight, who weighs 1200 N, stands on a pair of bathroom scales so that
one scale reads twice as much as the other. What are the scale readings?