Forces and motion

What is the word equation for speed?

Speed=distance/time

What is another word for speed?

Velocity

What is the unit for speed?

m/s

What is the unit for distance?

Metres

What is the unit for time?

Seconds

What is the symbol equation for speed?

v=s/t

What does the red line mean?

Steady speed

What does the blue line mean?

Stationary

What does the green line mean?

Faster - steady speed

What does the purple line mean?

Returning to start

What is the word equation for acceleration?

Acceleration=change in velocity/time taken

What is the symbol equation for acceleration?

a=(v-u)/t

What does A mean?

Acceleration

What does B mean?

Stationary

What does C mean?

Acceleration

What does D mean?

Decelleration

What is the unit for acceleration?

m/s²

How do you work out the distance traveled from a velocity-time graph?

Area under the velocity time graph

What is displacement?

Distance with direction

What is the equation for weight?

Weight = mass x gfs

What are the variables for the toy car experiment?

• Independent - Ramp steepness

• Dependent - Speed

• Control - Distance, weight of car, material of ramp

What does this line mean?

Increasing acceleration

What does this line mean?

Constant velocity

What does this line mean?

Positive constant acceleration

What does this line mean?

Decreasing acceleration

What is the equation for force?

force=mass x area

What is force?

Push or a pull that acts on an object

What is force measured in?

Newtons

What can a force cause an object to do?

• Change shape

• Change its motion

• Change its state of rest

Give an example of contact forces:

• Friction/air resistance (drag)

• Upthrust

• Tension

Give an example of non-contact forces:

• Weight

• Magnetic

What is meant by mass?

The amount of matter in a substance/object

What are the variables for Hooke’s Law practical?

• Independent - How many weights

• Dependent - Spring extension

• Control - Original spring length, material of spring

What makes stopping hard? (braking time/distance)

• Tyres

• Brakes

• The road conditions

• Steepness

• Wind

What makes stopping hard? (braking time, increases thinking distance+braking distance)

Speed

What makes stopping hard? (thinking time/distance)

• Alcohol

• Drugs

• Tiredness

• Age

• Distractions