Force & Motion Mixed Practice
What can make an object stop, speed up, slow down or change direction?
force
What keeps objects on earth from floating into space?
gravity
What would happen to earth if gravity suddenly stopped?
it would move in a straight line
Why? because the Sun's gravity keeps earth moving in orbit around the sun.
True or False: Your weight on Earth and on the Moon are the same?
False
A bicycle travels 100 miles in 10 hours. How fast is the bike traveling?
10 miles per hour
What changes when the force of gravity changes?
weight
A force that sets an object into motion is __________.
balanced or unbalanced
unbalanced
Which of the following is not used to reduce friction?
a. Wheels
b. Ball bearings
c. Oil
d. Rough surfaces
D. rough surfaces
Something that makes an object start moving, stop moving, speed up, slow down or change direction is a __________.
force
A rollercoaster travels a 6,600 ft track in 120 seconds. How many feet per second is the rollercoaster going?
55 feet per second
For every action there is an equal and opposite reaction is which of Newton’s laws?
A force that acts on an object when it rubs against another object or material is called ________.
friction
What is a force?
a push or a pull
True or False: Speed is equal to distance divided by time.
true
Ben runs 6mph for 3 miles, how far did Ben run?
18 miles
The measure of distance an object moves in a certain amount of time is called ________.
speed
The change in speed of an object in motion is called _________
acceleration
Describe the motion of a rope that is being pulled in opposite directions with the same force?
there would be no movement
True or False: The greater the mass of the object, the greater the force required to move or stop the object.
true
Sarah goes on a 4 hour trip, the first two hours she is traveling 70 miles per hour, the last two hours she is traveling 50 miles per hour. How much distance did she travel?
240 miles
Adding or subtracting individual forces gives a combined force called a ________.
net force
The tendency of an object to stay at rest or stay in motion is called _________.
inertia
The friction between an object and particles in the air is called __________.
air resistance
An object in motion will stay in motion, and an object at rest will stay at rest, unless acted on by an outside force is which of Newton's laws?
1st
Kim travels 65 mph for 3 hours and Ken travels 49 mph for 4 hours. Who travels the farthest and by how much?
Ken, by one mile.