Forces and energy

Question 1

What is a force?

Answer 1

A push or pull on an object caused by it interacting with another object

Question 2

what can happen when an object experiences force?

Answer 2

Change shape or speed

Question 3

what are the 3 none contact forces?

Answer 3

Weight, thrust, magnetic

Question 4

what is weight

Answer 4

the force acting on an object due to gravity

Question 5

weight equation

Answer 5

w=mg

n=kgxn/kg

Question 6

what is the gravitational force of earth?

Answer 6

9.8N/kg

Question 7

Distance

Answer 7

How far an object is moved. Scalar quantity: no direction

Question 8

Displacement

Answer 8

Distance and directin an objetc moves in a straight line from a start to an end point. Vector: direction and magnitude

Question 9

Speed v velocity

Answer 9

Both measure how fast your going but speed is scalar, velocity is vector

Question 10

An object moving in a circle

Answer 10

has constant speed but constantly changing velocity

Question 11

Distance traveled(s)=

Answer 11

speed(v) x time (t)

Question 12

Average walking speed

Answer 12

1.5m/s

Question 13

Average person running

Answer 13

3 m/s

Question 14

Average person cycling

Answer 14

6 m/s

Question 15

Average car, train and plane

Answer 15

25, 55, 250 m/s

Question 16

Acceleration

Answer 16

Rate of change of velocity

Question 17

Acceleration a=

Answer 17

change in velocity v/time t

Question 18

Uniform acceleration

Answer 18

final velocit *2 - initial velocity *2 = 2 x acceleration x distance