QUIZ 1

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Disregarding air resistance, objects fall at constant:

Acceleration

If the mass of an object does not change, a constant net force on the object produces constant:

Acceleration

When an object falls through air, its velocity increases and its acceleration:

Decreases

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

In a circular orbit satellites, the PE and KE are the same at all points

False

The horizontal motion of a projectile depends on the vertical motion.

False

When acceleration is "g", it is a free-fall.

False

The resistive force that opposes the motion or attempted motion of an object is called:

Friction

Your weight is:

The gravitational attraction between you and Earth

Every object possesses inertia

True

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

True

The escape speed from Earth is 11.2km/hr

True

The horizontal speed of a projectile is constant because gravity has no influence on it

True

The sum of the PE and KE are always the same.

True

The property which specifies the speed and direction of motion of an object is called.

Velocity

The force due to gravity is called:

Weight

Whenever the net force on an object is zero, its acceleration is:

Zero

A moving object has:

all of these

As an object freely falls, its:

velocity increases


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