forces and speed

Question 1

What is the formula for speed

Answer 1

distance divided by time (d/t)

Question 2

What force helps you float

Answer 2

upthrust

Question 3

How do you reduce friction

Answer 3

Streamlining, lubricating

Question 4

What force slows you down (in the air)

Answer 4

air resistance

Question 5

How dense does an object have to be to float on a liquid

Answer 5

Less dense than the liquid

Question 6

What is the formula for density

Answer 6

mass divided by volume (m/v)

Question 7

Which 2 forces act to pull us down

Answer 7

weight, gravity

Question 8

What is weight measured in

Answer 8

N (newtons)

Question 9

What is mass measured in

Answer 9

K (kilograms)

Question 10

What is the formula for weight

Answer 10

Mass times gravitational field strength (mXg)

Question 11

Can an object with no forces acting against it move.

Answer 11

Yes

Question 12

What is a vector quantity

Answer 12

A quantity with a size and direction

Question 13

What is a force

Answer 13

A push or a pull

Question 14

What is the difference between a driving force and a drag force

Answer 14

a driving force pushes or pulls an object and a drag force slows or stops an object’s motion

Question 15

What do you use to measure newtons

Answer 15

A newton meter

Question 16

What does it mean to lubricate

Answer 16

It means you make something smoother or more greasy so that it has less friction

Question 17

What does it mean to streamline

Answer 17

To make an object have less friction by making the object have a sharper shape with no protrusions

Question 18

What is a resistive force

Answer 18

A force that acts to slow down a moving object

Question 19

What does friction do

Answer 19

It opposes motion

Question 20

What is a reaction

Answer 20

The force provided by a solid surface like a wall or floor