Show:
4.01 Measuring position over Time
4.02 Pushing and pulling position and motion
4.03 Energy makes machines go round
4.04 Let the unbalanced force be with you AND
4.05 Motion Factors
4.07 Simple Machines
100
A car travels 150 miles at 50 mph. How long will it take to make the trip?
a. 2.5 hours b. 3.5 hours c. 3 hours d. 5 hours
100
An object in motion will stay in motion unless acted upon by which?
a. momentum b. inertia c. gravity d. an unbalanced force
100
How does having a heavier load contribute to how a vehicle moves?
a. does not affect the vehicle b. makes it harder to move c. makes it easier to move d. makes it easier to move at times, and easier to move at others
100
What is an example of balanced forces?
a. a person lifting a weight b. a person pushing a car c. a person getting out of a chair d. a person sitting in a chair
100
What type of simple machine is a staircase?
a. inclined plane b. lever c. wedge d. wheel and axle
200
A bike is moving at a constant speed of 5 meters per second. How far does it move in 10 seconds?
a. 15 meters b. 8 meters c. 30 meters d. 50 meters
200
What kind of forces are known to change the movement of an object?
a. balanced forces b. reaction forces c. resistant forces d. unbalanced forces
200
A pulley works against what force?
a. gravity b. wind force c. push d. inertia
200
Tasmine and James are rolling balls down a ramp. What force is responsible for the ball's movement?
a. acceleration b. gravity c. friction d. momentum
200
Roller skates, door knobs, and a wagon are examples of what simple machine?
a. lever b. pulley c. wheel and axle d. inclined plane
300
A flat tissue and a crumpled tissue are dropped from a high point. Which will take the longest to fall?
a. they will both land at the same time b. the crumpled tissue will land first c. the flat tissue will land first d. it is impossible to say without more information
300
Why would sand be put on the highways when there is a snow or ice storm?
a. decrease friction b. increase friction c. melt the snow d. melt the ice
300
One marble hits another marble and comes to a stop. The other marble moves. What has happened?
a. inertia b. momentum transfer c. acceleration d. constant speed
300
When a basketball player runs and comes to a stop very fast, the player is able to stop due to which force?
a. speed b. gravity c. friction d. acceleration
300
Using a hoe or a tool like that to cut and dig into soil is what simple machine?
a. lever b. wheel and axle c. inclined plane d. wedge
400
A dog runs 5 meters in 1 second; it runs 11 meters in 2 seconds. What is happening?
a. the dog is slowing down b. the dog is speeding up c. the dog is running at a constant speed d. the dog is running downhill
400
A person is pushing a car. What is the push most likely to change?
a. the car's inertia b. the mass of the car c. the position of the car d. the shape of the car
400
What decreases a person's effort when they are completing a physical task?
a. inertia b. simple machines c. resting d. momentum
400
What does decreasing the amount of surface area of an object in contact with another surface do?
a. increases friction b. does nothing c. decreases friction d. makes it stick
400
When raising a flag on a flagpole, you are using this type of simple machine?
a. wedge b. lever c. screw d. pulley
500
A marble is at the top of a ramp and a paper cup is at the bottom. What will make the paper cup move farther if the marble hits it?
a. the lower the ramp, the more force it will have to hit the cup b. it makes no difference where the ramp goes c. the higher the ramp the more force the marble will have and will push the cup farther away d. it will exhibit more force on the cup if the ramp is level
500
Tom rolls a toy car across the floor and measures the speed. He then adds a sloped ramp and rolls the car again. What could Tom expect to find out about the motion of the car after rolling down the ramp?
a. The car will go faster, but not as far. b. The car will go both father and faster. c. The car will go slower, and not as far. d. The car will go slower, but farther.
500
What is an example of gravity providing energy to help an object move?
a. Pulling a weight with a pulley b. Picking up a box of tools. c. a person going down a sliding board d. when a lever is used to lift something
500
A rough surface increases which of the following on an object in motion?
a. momentum b. inertia c. gravity d. friction
500
Aa screwdriver is used to pry open a paint can top. What kind of simple machine is it being used as?
a. lever b. pulley c. wedge d. inclined plane