Forces Test Multiple Choice

¡Supera tus tareas y exámenes ahora con Quizwiz!

The law of interia applies to

Both moving and nonmoving objects -An object's resistance to acceleration when a nonzero net force is exerted

A high school student hits a nail with a hammer. During the collision, there is a force

on the nail, and also the hammer

if surface area increases what happens to friction

the friction will increase

A force of 3 N accelerates a mass of 3 kg at the rate of 1 m/s2. The acceleration of a mass of 6 kg acted upon by a force of 6 N is

the same

An unfortunate bug splatters against the windshield of a moving car. Compared to the force of the car on the bug, the force of the bug on the car is

the same

After a cannonball is fired into frictionless space,e the amount of forced needed to keep it going equals

zero since no force is necessary to keep it moving

A 10-kg brick and a 1-kg book are dropped in a vacuum. The force of gravity on the 10-kg brick is

1o Times as much as the force on the 1-kg blook

A bag of sports equipment has a mass of 10.0 kg and a weight of

98 N

A box is being pushed by a constant force along a horizontal surface. If the object's velocity is constant, we can infer that there is ____ acting on the box

Frictional force

Which of the following is an example of a force which acts as a distance?

Gravity

if a book on the dashboard of your car suddenly flies towards you, the forward velocity of the car must have

Increased

If the force acting on a cart doubles, what happens to the carts acceleration?

It doubles

Compared to its weight on Earth, an 10-kg object on the moon will weigh

Less

Why is it so much more difficult to get a heavy table to start moving, than it is to keep it moving?

MS is greater than MK

If you were to weigh yourself in an elevator that is accelerating upward, compared to your ordinary weight, you would weigh

More

Newtons 3rd law refers to action-reaction forces. Theres forces always occur in pairs and

Never act on the same object

A spacecraft travels at a constant velocity in empty space far away from any center of gravity. Which of the following about the force applied on spacecraft is true?

No applied force is required to maintain a constant velocity.

The acceleration due to gravity is higher on Jupiter than on Earth. The mass and weight of a rock on Jupiter compared to that on Earth would be

Same, more

Which force is directly responsible for your ability to walk and stop

Static

A tow truck exerts a force of 2000 N on a car, accelerating it at 1 m/s2. What is the mass of the car?

2000 kg

Supposed the force of friction on a sliding object is 25 N. The force needed to maintain a constant velocity is

25 N

You pull horizonatally on a 50-kg crate with a force of 450 N and the friction force on the crate is 250 N. What is the acceleration?

4 m/s2

An apple weighs 1 N. The net force on the apple when it is in free fall is

1 N

Friction

-comes from microscopic bumps that act as obstructions to the object's motion -is the name given to the force acting between surfaces sliding past one another -acts in a direction that opposes motion of an object

The acceleration produced by a net force on an object is

-inversely proportional to the mass of the object -directly proportional to the magnitude of the net force -in the same direction as the net force

The mass of a lamb that weights 110 N is about

11 kg

A ball is thrown straight up. At the top of its path, the magnitude of the net force acting on it is

Equal to mg.

A player hits a ball with a bat. The action force is the impact of the bat against the ball. What is the reaction to this force?

The force of the ball against the bat.

A loaded truck collides with a car causing huge damage to the car. Which of the following is true?

The force of the truck is the same in magnitude as the force of the car

A player catches a ball. Consider the action force to be the impact of the ball against the players glove. What is the reaction to this force?

The force the glove exerts on the ball

Earth pulls downward on a pen, of mass m, which is sitting on a table; the magnitude of the force is mg. If that is called the action force, what is the reaction force?

The pen pulling upward on Earth with a force equal to mg.

If a horse pulls a wagon at rest, the wagon pulls back equally on the horse. Can the wagon be set into motion?

Yes because there is a net force acting on the wagon

The force to maintain an object at constant speed in free space is equal to

Zero

in order for a rocket ship in deep space, far from other objects, to move in a straight line with constant speed, it must exert a net force that is

Zero

A net force F acts on a mass m and produces a acceleration a. What acceleration results if a net force 3F acts on mass 6m?

a/2


Conjuntos de estudio relacionados

Lesson 3: Permissions and Ownership

View Set

Compensation: Pay-for-Performance Plans

View Set