test1

Force is a vector quantity because it has:

magnitude and direction

Ten seconds after starting from rest, a freely falling object (g=10m/s2) will ahve a speed of about:

100m/s

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

10 times as much as the force on the 1kg brick

A man weighing 800N stands at rest on two bathroom scales so that his weight is distributed evenly over both scales. The reading on each scale is:

400N

Starting from rest, the distance a freely falling object (g=1m/s2, and d=1/2gt2)will fall in 10 seconds is:

500m

A 10N falling object encounters 4N of air resistance. The magnitude of the net force on the object is:

6N

A block is dragged without acceleration in a straight-line path a cross a level surface by a force of 6N. What is the force of friction between the block and the surface?

6N

The property of things to resist changes in state of motion is called:

inertia

As a ball falls, the action force is the pull of the Earth's mass on the ball. The reaction force is the:

pull of the ball's mass on the Earth

A measure of how fast something is moving is called:

speed

The speed at which the acceleration of a falling object terminates when air resistance balances its weight is called:

terminal velocity

Compared with the same mass of a certain object on Earth, the mass of the same object on the Moon is:

the same

Neglecting friction, a large block of ice and a small block of ice start sliding down an incline together. The heavier block will get to the bottom:

the same time as the light block

The mass of a given object is the same on Earth and on the Moon.

True

The ratio of gravitational force (F) to mass (m) is the same for all objects in the same locality.

True

The average speed of a horse that gallops a distance of 10km in a time of 30 minutes:

20km/hr

Every object possesses inertia

True

Friction is the resistive force that opposes motion or attempted motion of an object.

True

In the absence of friction, no force is required to keep a horizontally moving object moving.

True

In vacuum, the acceleration of a free falling feather and stone is equal.

True

The rate of change of velocity with time (in magnitude, direction or both)is called:

acceleration

When you stand at rest on a pair of bathroom scales, the readings on the scales will always:

add equal to your weight

Which one has zero acceleration? An object

all of the above

The resistive force of friction occurs for:

all of these

If an object's mass is increase, while a constant force is applied to the object, its acceleration:

decreases

It is simply stated as a push or a pull.

force

Motion under the influence of gravitational pull only is called:

free fall

Space occupied by a given mass is called:

volume

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

zero

When a falling object has reached its terminal velocity, its acceleration is:

zero

Action and reaction forces are equal in strength and opposite in direction.

True

What is the acceleration of a car that maintains a constant velocity of 100 km/hr for 10 seconds?

0

Acceleration is the rate of change of distance per unit time.

False

An object in motion comes to a stop without any external force.

False

Force is always expressed as a push, but not as a pull.

False

Force of interaction indicates that, when you push an object, the object will pull you.

False

If the same force is applied on different masses, the one with the larger mass will have a high acceleration.

False

In a freefalling object, terminal speed is attained when the force of gravity and air resistance are equal.

False

In the same locality, the ratio of force to mass results in the same gravitational acceleration.

False

Inertia is the quantity of matter in an object.

False

Mass is the resistance of an object to a change in state of motion.

False

Terminal speed is the speed at which the acceleration of a falling object terminates when air resistance balances its weight.

False

The law of inertia holds true only for objects in motion, but not for those at rest.

False

The weight of a given object is the same on Earth and on the Moon.

False

Volume indicates how much matter an object contains.

False

When a falling object attains terminal velocity, gravitational acceleration will be the highest.

False

When the mass of an object is decreased while a constant force is applied on it, the acceleration of the object decreases.

False

Acceleration is the resistance of an object to a change in state of motion.

False (inertia)

Motion under the influence of gravitational force only is called free fall.

True