Forces and motion

Question 1

what are the two types of forces

Answer 1

contact and distance

Question 2

what is a contact force

Answer 2

a force that physically makes contact with objects

Question 3

what is an applied force

Answer 3

an applied force is done when an object makes contact with another object to move it from one place to another

Question 4

what an applied force causes

Answer 4

this force causes objects to accelerate or speed up

Question 5

what unit is an applied force

Answer 5

Newtons(N)

Question 6

acceleration

Answer 6

the change in velocity by increasing or decreasing in speed over time

Question 7

acceleration unit

Answer 7

length/time^2

Question 8

velocity

Answer 8

the change in distance over a measured time frame

Question 9

velocity units

Answer 9

length/time

Question 10

distance

Answer 10

movement that changes an object’s location in the world.

Question 11

displacement

Answer 11

movement that changes an object’s location in the world and does not return to it’s beginning location.

Question 12

reaction force

Answer 12

a force that shows when another force is applied

Question 13

what are two examples of a reaction force

Answer 13

friction and normal

Question 14

normal force

Answer 14

the reaction to gravity(weight)

Question 15

force normal (Fn) equation

Answer 15

Fn= gravity(g)•object mass

1g is about 10m/s^2

Question 16

friction forces

Answer 16

a force that acts against moving objects

Question 17

what does friction force cause

Answer 17

objects to slow down or heat up

Question 18

what is friction force affected by

Answer 18

coefficient of friction or weight of an object

Question 19

coefficient friction(µ)

Answer 19

This value is dependent on the materials that are making contact with each other.

Question 20

how to get less friction

Answer 20

F(friction) = µ(coefficient friction) • N(normal force)

Question 21

static friction

Answer 21

the amount of friction that prevents movement.

Question 22

kinetic friction

Answer 22

the amount of friction that occurs during movement.

Question 23

air resistance force

Answer 23

same as friction force (a force that acts against moving objects) just in the air instead of on ground