Unit 6: Energy and Forces on Earth

Question 1

The first American roller coaster was actually a train for moving coal down a mountain.

Accepted Answer

true

Question 2

If the track slopes down, gravity pulls the front of the car toward the ground...

Accepted Answer

all of the above

Question 3

A force that transfers energy out of a system, similar to friction, between a solid and air.

Accepted Answer

drag

Question 4

Force is

Accepted Answer

a push or a pull on that acts on an object

Question 5

Objects in motion tend to stay in motion unless outside force causes them change their motion

Accepted Answer

inertia

Question 6

What is a form of kinetic energy because it is the energy of a substance due to its motion?

Accepted Answer

mechanical energy

Question 7

Since a roller coaster has no engine, the coaster car is moved by gravity and momentum.

Accepted Answer

true

Question 8

As the car speeds up, you feel pressed against your seat. You feel this force because...

Accepted Answer

your inertia is separate from that of the coaster car.

Question 9

When you top a hill, what force carries you up while the car has already started down the hill?

Accepted Answer

inertia

Question 10

When does a coaster have the greatest amount of potential energy?

Accepted Answer

at the top of the first hill

Question 11

The energy reservoir built up in the lift hill is gradually lost to...

Accepted Answer

friction between the coaster car and air resistance., friction between the coaster car and the track

Question 12

If a coaster turns sharply right, what does the inertia cause your body to want to do?

Accepted Answer

keep going straight ahead

Question 13

Slows motion because it transfers energy out of a system, turning mechanical energy into heat

Accepted Answer

Friction

Question 14

Energy stored in the bonds of atoms and molecules is called

Accepted Answer

chemical energy

Question 15

What is an example of centripetal force?

Accepted Answer

a loop on a roller coaster

Question 16

Any change in position, speed, or state of matter due to force is called

Accepted Answer

work

Question 17

Acceleration is how quickly something speeds up

Accepted Answer

true

Question 18

Energy is

Accepted Answer

the ability to do work

Question 19

Energy is what makes a rollercoaster ride last, but forces are what makes it so thrilling.

Accepted Answer

true

Question 20

The picture is an example of...

Accepted Answer

you will keep going in a direction, unless something happens, the Law of Inertia

Question 21

A roller coaster constantly changes its acceleration and its position to the ground.

Accepted Answer

true

Question 22

Potential Energy is referred to as...

Accepted Answer

stored energy

Question 23

the energy of motion is

Accepted Answer

kinetic

Question 24

A force that keeps an object moving along a curved path is

Accepted Answer

centripetal

Question 25

Once you start down the first hill, gravity takes over & _____ energy changes to ____energy.

Accepted Answer

potential changes to kinetic

Unit 6: Energy and Forces on Earth

Questions 25

Unit 6: Energy and Forces on Earth

Questions 25