TRUE or FALSE: Fluid friction is a force that opposes the motion of an object through a fluid such as water.
TRUE
Oops!
Check
Okay!
Check
5
The curved path caused by the combination of initial forward velocity and the downward force of gravity is known as __________.
projectile motion
Oops!
Check
Okay!
Check
heart
Other team wins 15 points!
Oops!
magnet
Take 10 points!
Okay!
rocket
Go to first place!
Okay!
thief
Give points!
5
10
15
20
25
20
Describe how air resistance and gravity affect the motion of a falling object.
Gravity (downward force) causes the object to accelerate; Air resistance (upward force) acts opposite gravity to slow the object down.
Oops!
Check
Okay!
Check
20
What is the difference between MASS and WEIGHT?
Mass is a measure of the amount of 'stuff' an object is made out of; Weight is a measure of force of gravity acting on an object.
Oops!
Check
Okay!
Check
10
TRUE or FALSE: A force can act to cause an object at rest to move or it can accelerate an object that is already moving.
TRUE
Oops!
Check
Okay!
Check
10
According to Newton's 2nd law of motion, acceleration of an object depends upon the _______ of the object and the __________ acting on it.
mass, net force
Oops!
Check
Okay!
Check
5
What do we call the OVERALL force acting on an object after all the forces are combined?
Net force
Oops!
Check
Okay!
Check
seesaw
Swap points!
Oops!
rocket
Go to first place!
Okay!
fairy
Take points!
5
10
15
20
25
lifesaver
Give 15 points!
Oops!
10
TRUE or FALSE: Because the weight formula shows that mass and weight are proportional, doubling the mass of an object will not affect its weight.
FALSE
Oops!
Check
Okay!
Check
5
On the moon, the acceleration due to gravity is only about one sixth that on Earth. Thus, an object will weight _________ on the moon than it weighs on Earth.
less
Oops!
Check
Okay!
Check
5
___________ is an attractive force that pulls objects together.
Gravity
Oops!
Check
Okay!
Check
5
TRUE or FALSE: Friction is a force that helps objects that are touching move past each other more easily.
