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Science 6 Chapter 6 Test Set A

Test Description: Force

Instructions: Answer all questions to get your test result.

1) What happens when two forces act in the same direction?

ATheir sum divided by two is the total force. BThey cancel each other out. CThe stronger one prevails. DTheir strengths are added.

2) The greater the mass of an object

Athe more space it takes up Bthe greater its inertia Cthe more balanced it is Dthe easier the object starts moving

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

Afree fall Bweight Cterminal velocity Dmass

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

Ainertia Bfriction Cacceleration Dgravity

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

Aattract each other Bcombine to provide a balanced force Ccreate friction Drepel each other

6) Forces can be added together only if they are

Abalanced forces Bunaffected by gravity Cacting on the same object Dsubstantial

7) According to the law of conservation of momentum, when two objects collide in the absence of outside forces,

Avelocity decreases Bthe objects have the same momentum before and after they collide Cvelocity increases Dthe objects have more momentum after they collide than they did before

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

Abalanced force Bgravitational force Ccentripetal force Dunbalanced force

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

Aacceleration Bvelocity Cforce Dinertia

10) According to Newton's Third Law of motion, when a hammer strikes and exerts force on a nail, the nail

Amoves at a constant speed Bcreates friction with the hammer Cdisappears into the wood Dexerts an equal and opposite force on the hammer

*select an answer for all questions

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