Name _____________________________________________________________
Period _________
Warm-ups 1.1
1. Draw a vector that shows a force of 40 lb to the East. Draw another vector that shows a force of 20
lb to the south.
2. Show the resulting vector both magnitude and direction.
1. What is the S.I. unit for speed?
2. Is your answer to #1 a base unit or a derived unit?
Going for a jog, you take the following path: 5 mi. south, 4 mi. east, 6 mi. north, 3 mi. east, and 7 mi. south.
1. Draw a free-body diagram of this jog.
2. What is the total distance you ran?
3. What is the displacement?
A horse runs around a circular track with a radius of 64m.
1. What is the displacement of the horse when it is halfway around the track?
2. What is the distance the horse has run when it is half way around the track? (Hint:
Circumference=2πr)
3. What is the horse’s displacement when it completes one lap?
An airplane is flying upward at a 45˚ angle. The plane is not changing its speed or direction.
1. Draw a free-body diagram (a picture showing all the forces acting on the plane).
2. What is the net force on the plane?
3. What can you say about the plane’s speed?
A crane is lifting a wrecking ball that weighs 400 N.
1. If the crane produces a net force of 9 N what is the total upward force.
2. If a worker gives the ball a push of 40 N to the right and the frictional force is 24 N to the left, what
is the result if all of these things happen at the same time?
1. Where would a car have the most mass? On the moon, earth, or sun?
2
Where would a car have the most weight? On the moon, earth, or sun?
3. From the standpoint of correct terms in physics, would it make sense to say, “my bike weighs 41
kilograms”? Explain why or why not.
Which of these forces are affecting the ball? More than one force is possible.
Draw a picture of the path of the puck after the kick.