Show:
Motion
Speed and Velocity
Forces
Work and Power
Newton's Laws
100
Which object has a steady, or constant, motion? a. a sea star b. a heartbeat c. the Earth d. a pendulum
The Earth
100
True or False Speed is the rate at which something moves, happens, or functions.
True.
100
What is a push or pull that acts on an object? a. work b. force c. power d. magnetism
b. force
100
True or False If a person performs the same amount of work as another person in half the time then, that person has used more power.
True.
100
The state in which the net force is zero is ____________. a. power b. gravity c. equilibrium d. work
c. equilibrium
200
True or False Parts of your body are always in motion.
True. You spend every moment of each day moving in one way or another. Ex: eyes blinking, heart beats, etc.
200
A car is traveling at 60 miles per hour. What additional information would we need to know to determine the velocity of the car? a. weight b. mass c. direction d. how many miles the car will travel
c. direction
200
The force of attraction that exists between any two objects; causes objects to have weight. a. gravity b. magnetism c. inertia d. mass
a. gravity
200
Energy used when a force moves an object is... a. power b. force c. gravity d. work
d. work
200
The tendency of an object to resist a change motion. a. equilibrium b. friction c. inertia d. opposing
c. inertia
300
True or False An example of vibrational motion is a pendulum.
False. An example of vibrational motion is a a guitar string or rubber band after it's been plucked.
300
Velocity is the speed and ___________ of an object's motion. a. inertia b. force c. direction d. power
c. direction
300
How do magnetism an electricity act on different objects? a. They can either push or pull objects. b. They can only push objects. c. They can either push or pull objects only if they touch. d. They can only pull objects.
a. They can either push or pull objects.
300
Machine A performs 64 Joules of work in 4 seconds. Machine B performs the same amount of work in half the time. Which statement is true about Machines A and B? a. Machine A and B used the same amount of power. b. Machine A used more power than Machine B. c. Machine A and Machine B used no power. d. Machine B used more power than Machine A.
d. Machine B used more power than Machine A.
300
When you ride a roller coaster, what makes your body rise out of its seat at the top of a hill? a. inertia b. friction c. electricity d. friction
a. inertia
400
True or False Motion is measured by an object's relationship to outer space.
False. Motion is measured by an object's relationship to a point of reference.
400
Frank and Jerry were learning about bus travel. They read about a bus that traveled 200 miles in 4 hours at a __________ of 50 miles per hour. Which answer best completes the sentence? a. speed c. velocity b. time d. distance
a. speed
400
_________ is a contact force that resists the movement of one surface past another surface. a. equilibrium b. friction c. gravity d. opposing
b. friction
400
The rate at which work is done is___________. a. power b. force c. acceleration d. equilibrium
a. power
400
The rate at which the velocity changes over time is _________. a. acceleration b. work c. distance d. speed
a. acceleration
500
True or False A pendulum has periodic motion.
True. A pendulum has periodic motion; it swings back and forth.
500
A train travels 180 miles west in 2 hours. What is the velocity of the train? Hint: Speed = distance/time a. 90 miles per hour c. 90 miles per hour/west b. 360 miles per hour d. 360 miles per hour/west
c. 90 miles per hour/west
500
Mary uses all her force to roll a bowling ball away from her body. Then, Mary repeats the same procedure with a soccer ball. How does the movement of the two balls contrast? a. The soccer ball moves a greater distance because it has less mass. b. The soccer ball moves a greater distance because more force is acting on it. c. The bowling ball moves a greater distance because it has more mass. d. The bowling ball moves a shorter distance because less force is acting on it.
a. The soccer ball moves a greater distance because it has less mass.
500
A force is traveling in a straight line in space. No forces are affecting it. What wil happen to the object's motion? a. It will gradually stop because there is no force keeping it moving. b. It will stop immediately when the force that started its motion goes away. c. It will not change. It will continue in the same direction at the same speed. d. It will move faster and fasterbecause there is no force to stop it.
c. It will not change. It will continue in the same direction at the same speed.
500
Andrea was pushing against the wall. Which statement is true? a. Andrea pushed the wall with more force than the wall pushed in Andrea's direction. b. Andrea pushed the wall and it changed position and direction. c. Andrea pushed the wall with a great amount of friction. d. Andrea and the wall pushed against each other with the same amount of force.
d. Andrea and the wall pushed against each other with the same amount of force.