Download Chapter 5 Section 2

Name ________________________ Period ________ Date ______________________
Chapter 5:2: What is a Force?
Answer the following questions.
1. Define Force.
2. Explain the difference between balanced and unbalanced forces and how each
affects the motion of an object.
3. Give four examples of force being exerted.
4. What is a net force?
5. What S.I. unit(s) is used when calculating force?
6. Are the forces on a kicked soccer ball balanced or unbalanced? How do you
know?
7. Two forces act on an object. One force has a magnitude of 10 N and is directed
toward the north. The other has a magnitude of 5 N and is directed toward the
south. The object experiences a net force of ________________. Draw a
diagram explaining your answer. Use arrow vectors in your drawing.
8. A friend is helping you rearrange your bedroom furniture. You exert 25 N of
force to push the foot end of the bed while your friend exerts 20 N of force
pulling the head-end of the bed. The net force being used to move the bed is
________________. Draw a diagram explaining your answer. Use arrow
vectors in your drawing.
9. A river is flowing at a velocity of 0.15 m/s west. If a swimmer is swimming
against the current at a velocity of 0.22 m/s east, how many hours will it take him
to swim 1 km? Show your work? Remember the triangle equation for speed!