Physics Forces

Forces 1

100

A force that opposes motion

Friction

200

What force keeps the Earth in orbit?

Gravity

300

800J of work are done by a 50N force. What is the distance moved?

16m

400

What is the rate of change of velocity?

Acceleration

500

Who's Law is F = M x A

Newton's Law

Forces 2

100

What force is caused by gravity acting on a mass

Weight

200

A thrust force of 500N acts on a 1000kg car. What is the acceleration?

0.5 m/s²

300

An object falling through the air eventually reaches

Terminal speed

400

Mass is measured in ?

Weight is measured in ?

Work is measured in ?

Acceleration is measured in ?

kg

N

J

m/s²

500

What is the proper name for the overall force acting on a body?

Resultant Force (net force)

Forces 3

100

Thrust on a car is 600N. Resistive Forces are 400 N

What is the Resultant Force ?

200N

200

Engine force of a car is 1000N. 

Friction is 200N 

Air resistance is 250N

What is the Resultant force?

550N

300

What does the gradient on a distance time graph show us?

Speed

400

Magnetic, electrostatic and gravitational are non-contact forces. What separates the first two from the third?

They can attract and repel, gravitational only attracts

500

Four contact forces

Friction

Air resistance

Tension

Normal contact

Forces 4

100

Odd one out: Tension, Kinetic, Weight, Friction

Kinetic

200

Force that acts upwards in water

Upthrust

300

I am underwater. Upthrust is 1000N and weight is 900N

What happens?

I move upwards

400

What does the gradient of a speed time graph show?

Acceleration

500

How do we show deceleration?

Minus sign

Forces 5

100

F= ma - whose Second Law is this? (DOUBLE)

Isaac Newton

200

The momentum of an object depends on two things - what are they? (DOUBLE)

MASS and SPEED

300

Correct the sentence:

SCALAR quantities have SIZE and DIRECTION but VECTOR quantities have SIZE only

Scalar - Size

Vector - size and direction

400

The gradient of a distance time graph tells you the ?

Speed or Velocity

500

On holiday on Mars, Gravity is 1.6N/kg. I have a mass of 80Kg. I eat 10kg of Pies. What is my new weight ?

144N

Forces 6

100

Four factors that affect braking distance (be specific)

Wet roads

Icy roads

Badly maintained brakes

Bald tyres

Passengers / mass

Speed 

200

Four factors that affect thinking distance (be specific)

Old age

Drinking alcohol

Taking drugs

Distractions

Speed

Tiredness

300

Range of reaction times

0.2-0.9m/s

400

Speed of sound

330m/s

500

The point at which a spring stops behaving like a spring

Limit of proportionality

Elastic limit