Download Forces and Motion Review

Forces and Motion Review
1. What does an object
have that will cause it to
resist a change in
motion?
Inertia
2. What are the two
elastic forces called?
Tension and Compression
3. The weight of an object is
dependent on its
_________________.
Mass
4. What are forces
measured in?
Newtons
5.Calculate the kinetic energy
of a beagle that weighs 30
kg and is running at a
speed of 4 m/s.
240 J
6. If Shelby’s mass is 16
kg, what will be her mass
on the moon?
16 kg – Mass does NOT
change on different planets.
7. What about you is
going to change on
different planets?
Weight
8. Why does your
weight change on
different planets?
Weight is the force of gravity and there
are different amounts of gravity on
each planet so therefore your weight
will change.
9. Anything that has
mass and takes up space
is known as what?
Matter
10. If the north pole of one
magnet is brought near the
north pole of another magnet,
what is going to happen?
Repulsion
11. Give an example of
Newton’s First Law of
Motion.
When you roll a ball and it a hits a
wall, the wall is the unbalanced force
that stops the ball’s motion.
12. What has the greatest
impact on the friction of a block
pulled across a surface?
The type of surface in
contact with the block.
13. What is the energy
associated with the
mousetrap car, the fan car,
the rollercoaster or any
other moving object called?
Kinetic Energy
14. If I put my dachshund, Greta,
who weighs 10 kg on top of a table
that is 2 meters high. What is her
gravitational potential energy?
(Don’t forget to multiply by the
force of gravity: 9.8 N/kg)
10 kg x 2 m x 9.8 N/kg = 196 J
15. What kind of force are
you exerted when you rub
your hands together?
Frictional Force
16. The amount of matter in an
object is _________________.
Mass
17. Explain the motion of
the mousetrap car and
the fan car.
Fan Car – speed is constant
Mousetrap car – great acceleration
and an abrupt stop.
18. If a car travels 30
meters in 10 seconds,
what is the average
speed?
3 meters/second
19. You pull a wooden block at a
steady speed across a tabletop with a
spring scale. The scale registers 2.00 N.
If you place another block (just like the
first one) on top of the block and pull
the two blocks with the spring scale at
a steady speed, what will the scale
register?
4.00 N
20. A rubber band is stretched 2.0
cm with a spring scale, and the
spring scale registers 3.0 N. If you
stretched the rubber band twice as
far (to 4.0 cm), what would you
expect the spring scale to register?
6.00 N
21. Earth’s ___________
attracts objects near it, just like
magnets attract objects near
them.
Gravity