Classroom Activity Response Device (CARD)

If you see an object moving with constant speed and direction, we know that it must have:

A.A force pushing along itB.An accelerationC.No force acting on itD.No net force acting on it

Neglecting air drag, a heavy ball and a light ball both fall at the same rate because:

A. The force of gravity on each is the sameB. The force of gravity on an object increases

with its massC. The force of gravity on each increases as

they get closer to the Earth.

Astronauts feel weightless in Earth orbit because:

A. Earth’s gravity gets weaker as one moves away from its center

B. The spacecraft’s propulsion counteracts the force of gravity

C. They are falling towards the Earth’s center at the same rate as everything around them.

D. Being inside or close to the spacecraft shields them from the effects of Earth’s gravitational field.

If you take a box of candy from the Earth to the Moon, its mass ___ and its weight ___.

A. increases, decreasesB. Increases, stays the sameC. Stays the same, decreasesD. stays, the same, stays the same

The gravitational pull of the Earth on the Sun is ____ the pull of the Sun on the Earth.

A. Stronger thanB. Equal toC. Weaker thanD. In the same direction as

If there is no net force on an object:

A. No motion is possibleB. Its speed cannot changeC. Its direction cannot changeD. Both B and C

If a planet travels in a circular orbit without speeding up or slowing down, is it accelerating?

A. Yes!B. No!

If a planet travels in a circular orbit without speeding up or slowing down, must it have a force acting on it?

What can produce an acceleration in the car?

A. The gas pedalB. The brakeC. The steering wheelD. All of the above

Thought question:A hockey player (100 kg) collides with a 50-kg figure skater

Q: Who experiences the greater force of impact?

Q: Who experiences the greater change in motion (acceleration)?

Follow up:

Which experiences the stronger pull of gravity: Earth or Moon? Which experiences the greater change in motion?

http://faculty.polytechnic.org/cfletcher/ConceptualManual_w_o_spaces_pdf/d-Conc-Qs-ch05--N.S.L.pdf

The tendency of an object to resist any change of motion is known as ______.

a. forceb. massc. inertiad. balance

The amount of matter in an object is called its ________.

a. massb. balancec. forced. weight

The greater the mass of an object,

a. the less force it can exert.b. the more space it takes up.c. the more balanced it is.d. the greater the inertia.

The force of gravity of a person or object at the surface of a planet is known as?a. massb. air resistancec. inertiad. weight

A book is sitting on a dashboard of a car that's stopped at a traffic light. As the car starts to move forward, the book slides off thedashboard. Pick the most correct explanation.

a. There was grease on the dashboardb. The object had inertia.c. A supernatural force took over.d. Air resistance made the book move backward.

A force that one surface exerts on another when the two rub against each other is called ________.a. gravityb. accelerationc. inertiad. friction

According to Newton's Third Law of Motion, when a hammer strikes and exerts a force on a nail, the naila. creates a balanced force.b. disappears into the wood.c. moves at a constant speed.d. exerts and equal and opposite force back on the hammer

Pick the best example of Newton's Third Law in action.a. A rocket taking off from earth which pushes gasses in one direction and the rocket in the other.b. A rocket sitting on the ground preparing for take-off but it needs an outside force to overcome its inertia of a non-movingobject.c. A rocket that is accelerating through space and exerts a great amount of force because its mass and acceleration is solarge.d. Both b and c.

Pick the best example of Newton's Second Law in action.a. A rocket taking off from earth which pushes gasses in one direction and the rocket in the other.b. A rocket sitting on the ground preparing for take off but it needs an outside force to overcome its inertia of a nonmovingobject.c. A rocket that is accelerating through space and exerts a great amount of force because its mass and acceleration is solarge.d. Both b and c.

Pick the best example of Newton's First Law in action.a. A rocket taking off from earth which pushes gasses in one direction and the rocket in the other.b. A rocket sitting on the ground preparing for take off but it needs an outside force to overcome its inertia of a nonmovingobject.c. A rocket that is accelerating through space and exerts a great amount of force because its mass and acceleration is solarge.d. Both b and c

An example of a balanced force isa. a car sliding on ice.b. a tug-of-war game in which no one wins.c. a car hitting a telephone pole.d. a roller coaster going down the first drop.

An example of an unbalanced force (net force) isa. a car parked in the garage.b. a tug-of-war game in which no one wins.c. a bridge.d. a roller coaster going down the first drop.

In physical science, a push or pull is called a(n)________.a. gravityb. forcec. universal lawd. inertia

When two equal forces act on the same object in opposite directions, the net force is ________.a. crazyb. greater than either forcec. zerod. smaller than either force

The word "acceleration" means toa. exert a force on another object.b. create a balanced force on another object.c. create an unbalanced force on another object.d. change the speed or direction.

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