8th SC chp1

What happens when two forces act in the same direction?

• weight is added

• friction

• strength is added

• strength is taken out

The greater the mass of an object the _____________ its inertia.

• smaller

• same

• greater

• half pint

The force of gravity on a person or object on the surface of a planet is called

• weight

• distance

• mass

• velocity

The force that one surface exerts on another when the two rub against each other is called

• velocity

• attraction

• friction

• weight

The law of universal gravitation states that any two objects in the universe that have mass, without exception,

• attract opposites

• attract each other

• have no attraction

• act as the same

Forces can be added together only if they are

• acting off each other

• acting together

• acting up

• acting on the same object

According to the law of conservation of momentum, when two objects collide in the absence of outside force the objects have

• the same momentum before but not after

• the same momentum before and after

• different momentum

• friction

Any force that causes an object to move in a circle is called a(n)

• centripetal force

• strength in force

• velocity force

• mental force

The momentum of an object is in the same direction as its

• front

• velocity

• mass

• weight

According to Newton's third law of motion, when a hammer strikes and exerts force on a nail, the nail exerts

• bending

• irrational

• equal and opposite force

• opposite force