# Physical Science - Chapter 5 Part 2 Question Preview (ID: 2269)

### Force, Motion, Gravity, And Friction.[print questions] Answers? Play games to get them!

The gravitational pull is greater between two objects that
a) have greater masses
b) have rougher surfaces
c) are farther apart
d) are moving at greater speed

What is the net force on an object when you combine a force of 10 N north with a force of 5 N south?
a) 5 N south
b) 50 N north
c) 15 N north
d) 5 N north

Mass is
a) different on the moon than on Earth
b) a measure of gravitational force
c) a measure of the amount of matter or stuff
d) measured in newtons

Dividing the total distance traveled by the total time in a certain direction is how to calculate
a) average speed
b) average acceleration
c) average velocity
d) average motion

The difference between speed and velocity is that
a) velocity involves time, while speed does not
b) velocity has direction, while speed does not
c) speed involves time, while velocity does not.
d) speed has direction, while velocity does not

To produce change in motion, a force must be a(n)
a) balanced force
b) frictional force
c) unbalanced force
d) gravitational force

A hikerвЂ™s velocity begins at 1.8 m/s uphill and changes to 1.5 m/s uphill. How do you know that the hiker has a negative acceleration?
a) His direction changed
b) His direction was unchanged
c) His speed increased
d) His speed decreased.

In which of the following is a skater NOT accelerating
a) going straight while speeding up
b) going straight at constant speed
c) making circles at constant speed
d) going straight while slowing down

A student has a weight of 420 N on Earth. What is the studentвЂ™s weight on the moon.
a) 70 N
b) 70 kg
c) 2520 N
d) 2520 kg

Give 3 examples of friction being helpful in everyday life
a) being able to walk forwards, rubbing hands together for warmth, engine components wearing out
b) being able to walk forwards, brakes on a car, holes in socks
c) brakes on a car, rubbing hands together for warmth, rug burns
d) being able to walk forwards, brakes on a car, rubbing hands together for warmth

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