# Velocity Chapter 2 Quiz Questions

48 Questions | Attempts: 157
Share  Settings  • 1.
Which of the following quantities is not a vector quantity?
• A.

Velocity

• B.

Acceleration

• C.

Mass

• D.

Force

• 2.
Which of the following statements is incorrect?
• A.

All vector quantities have directions

• B.

All vector quantities have magnitudes

• C.

All scalar quantities have directions

• D.

All scalar quantities have magnitudes

• 3.
A box suspensed by a rope is pulled to one side by a horizontal force. The tension in the rope
• A.

Is less than before

• B.

Is unchanged

• C.

Is greater than before

• D.

May be any of the above, depending on how strong the force is

• 4.
The sum of two vectors is a minimum when the angle between them is
• A.

0

• B.

45

• C.

90

• D.

180

• 5.
In which of the following examples is the motion of the car not accelerated?
• A.

A car turns a corner at the constant speed of 20 km/h

• B.

A car climbs a steep hill with its speed dropping from 60 km/h at the bottom to 15 km/h at the top

• C.

A car climbs a steep hill at the constant speed of 40 km/h

• D.

A car climbs a steep hill and goes over the crest and down on the other side, all at the same speed of 40 km/h

• 6.
Two objects have the same size and shape but one of them is twice as heavy as the other. They are dropped simutaneously from a tower. If air resistance is negligible,
• A.

The heavy object strikes the ground before the light one

• B.

They strike the ground at the same time, but the heavy object has the higher speed

• C.

They strike the ground at the same time and have the same speed

• D.

They strike the ground at the same time, but the heavy object has the lower acceleration because it has more mass.

• 7.
The acceleration of a stone thrown upward is
• A.

Greater than that of a stone thrown downward

• B.

The same as that of a stone thrown downward

• C.

Less than that of a stone thrown downward

• D.

Zero until it reaches the highest point in its path

• 8.
You are riding a bicycle at constant speed when you throw a ball vertically upward. It will land
• A.

In front of you

• B.

• C.

Behind you

• D.

Any of the above, depending on the ball's speed.

• 9.
WHen an object is accelerated,
• A.

Its direction never changes

• B.

Its speed always increases

• C.

It always falls toward the earth

• D.

A net force always acts on it

• 10.
If we know the magnitude and direction of the net force on an object of known mass, Newton's second law of motion lets us find its
• A.

Position

• B.

Speed

• C.

Acceleration

• D.

Weight

• 11.
The weight of an object
• A.

Is the quantity of matter it contains

• B.

Is the force with which it is attracted to the earth

• C.

Is basically the same quantity as its mass but is expressed in different units

• D.

Refers to its inertia

• 12.
Compared with her mass and weight on the earth, an astronaut on Venus, where the acceleration of gravity is 8.8 m/s^2, has
• A.

Less mass and less weight

• B.

Less mass and the same weight

• C.

Less mass and more weight

• D.

The same mass and less weight

• 13.
The earth and the moon exert equal and opposite forces on each other. The force the earth exerts on the moon
• A.

Is the action force

• B.

Is the reaction force

• C.

Can be considered either as the action of as the reaction force

• D.

Cannot be considered as part of an action-reaction pair because the forces act in opposite directions

• 14.
A car that is towing a trailer is accelerating on a level road. The magnitude of the force the car exerts on the trailer is
• A.

Equal to the force the trailer exerts on the car

• B.

Greater than the force the trailer exerts on the car

• C.

Equal to the force the trailer exerts on the road

• D.

Equal to the force the road exerts on the trailer

• 15.
When a boy pulls a cart, the force that causes him to move foward is
• A.

The force the car exerts on him

• B.

The force he exerts on the cart

• C.

The force he exerts on the ground with his feet

• D.

The force the ground exerts on his feet

• 16.
In order to cause something to move in a circular path, it is necessary to provide
• A.

A reaction force

• B.

An inertial force

• C.

A centripetal force

• D.

A gravitational force

• 17.
An object is moving in a circle with a constant speed. Its acceleration is constant in
• A.

Magnitude only

• B.

Direction only

• C.

Both magnitude and direction

• D.

Neither magnitude nor direction

• 18.
A car rounds a curve on a level road. The centripetal force on the car is provided by
• A.

Inertia

• B.

Gravity

• C.

Friction between the tires and the road

• D.

The force applied to the steering wheel

• 19.
The centripetal force that keeps the earth in its orbit around the sun in provided
• A.

By inertia

• B.

By the earth's rotation on its axis

• C.

Partly by the gravitational pull of the sun

• D.

Entirely by the gravitational pull of the sun

• 20.
The gravitational force with which the earth attracts the moon
• A.

Is less than the force with which the moon attracts the earth

• B.

Is the same as the force with which the moon attracts the earth

• C.

Is more than the force with which the moon attracts the earth

• D.

Varies with the phase of the moon

• 21.
The speed needed to put a satellite in orbit does not depend on
• A.

The mass of the satellite

• B.

• C.

The shape of the orbit

• D.

The value of g at the orbit

• 22.
An astronaut inside an orbiting satellite feels weightless because
• A.

He or she is wearing a space suit

• B.

The satellite is falling toward the earth just as fast as the astronaut is, so there is no upward reaction force on him or her

• C.

There is no gravitational pull from the earth so far away

• D.

The sun's gravitational pull balances out the earth's gravitational pull

• 23.
A bicycle travels 12 km in 40 min. Its average speed is
• A.

0.3 km/h

• B.

8 km/h

• C.

18 km/h

• D.

48 km/h

• 24.
Which one or more of the following sets of displacements might be able to return a car to its starting point?
• A.

5, 5, and 5 km

• B.

5, 5, and 10 km

• C.

5, 10 and 10 km

• D.

5, 5, and 20 km

• E.

A, B, and C

• 25.
An airplane whose airspeed is 200 km/h is flying in a wind of 80 km/h. The airplane's speed relative to the ground is between
• A.

80 and 200 km/h

• B.

80 and 280 km/h

• C.

120 and 200 km/h

• D.

120 and 280 km/h

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