Download Review for Forces Test

Review for Forces Test
Describe an objects velocity and
acceleration when the net force is zero?
Describe an objects velocity and
acceleration when the net force is not
zero?
Which of the following objects has
more inertia?
A student pushes on two blocks. The blocks are
moving to the right. Block A has more mass than
block B. There is friction between the blocks and
the table.
If the blocks are moving at a constant speed, which of the following
statements is true about the magnitude of the forces?
a. The forces that block A exerts on block B is greater than the
force that block B exerts on block A.
b. The forces that block A exerts on block B is less than the force
that block B exerts on block A.
c. The forces that block A exerts on block B is equal to the force
that block B exerts on block A.
d. They cannot be compared unless we know how fast the
blocks are slowing down.
A student pushes on two blocks. The blocks are
moving to the right. Block A has more mass than
block B. There is friction between the blocks and
the table.
If the blocks are moving at a constant speed, which of the following
statements is true about the magnitude of the forces?
a. The forces that block A exerts on block B is greater than the
force that block B exerts on block A.
b. The forces that block A exerts on block B is less than the force
that block B exerts on block A.
c. The forces that block A exerts on block B is equal to the force
that block B exerts on block A.
d. They cannot be compared unless we know how fast the
blocks are slowing down.
What is weight? Explain how weight
can change.
If an object on earth has a mass of 7
kg, what is its weight?
If an object weights 900 N on earth,
what is its mass?
What would its weight be on the moon
where g=1.62 m/s/s?
If a 50 N horizontal force to the
right and a 20 N force to the left
are acting on a 15 kg object
simultaneously, what will the
acceleration of the object be?
A rock with a weight of 10 N is resting on a table. A
student makes a number of statements about this
situation.
The normal force exerted on the rock by the table is a
force of 10 N; the reaction force to this normal force is a
force of 10 N exerted on the rock by gravity in the
downward direction.
What if anything is wrong with this statement? If
something is wrong, identify it and explain how to
correct it. If it is correct, explain why.
Draw a free body diagram of an object
for each of the following scenarios.
• A hockey puck accelerating to the right over
the ice.
• A penny in free fall.
• A penny in terminal velocity.
• A dog at rest on his bed.
• A desk being pushed across the carpet at a
constant velocity.
How could you show an
unbalanced force using a velocity
time graph?
Acceleration graph?
Position graph?
A 36 kg kid on ice skates is pushed
with a force of 97 N. How would
the kid accelerate?