CH 8 Forces

Question 1

True or false? Forces always act in pairs?

Answer 1

True. Forces always act in pairs of equal size, acting in opposite directions.

Question 2

When two objects interact they exert forces on each other. Will these forces act in the same direction?

Answer 2

Opposite, whenever two objects interact they exert equal and opposite forces on each other

Question 3

Leanne is riding a bike, the forward force from her peddling is 18N there is a backward force of 6N
From friction and a backward force of 12N from air resistance. Does the speed of the bike increase, decrease, or not change

Answer 3

Not change, resultant force =18N-6N-12N=0, no speed change

Question 4

Give the general name for the type of quantity that has magnitude but no particular direction

Answer 4

Scalar

Question 5

Is time scalar or vector-

Answer 5

Scalar, time does not have a direction

Question 6

Give the general name for the type of quantity that has magnitude and acts in a particular direction

Answer 6

Vector