What do objects increasing in speed not have?
Momentum
Mass
Balanced forces
How do you calculate momentum?
\[\text{m}~=~{\text{m}}\times{\text{v}}\]
\[\text{p} = {\text{m}}\times{\text{v}}\]
\[\text{m =}~\frac{\text{p}}{\text{v}}\]
What are the units of momentum?
N
kgms
kg m/s
What does conservation of momentum mean?
When objects collide the total momentum stays the same
When objects collide the momentum is that of the largest object
When objects collide the momentum is that of the smallest object
What is the formula for calculating force?
Time ÷ change in momentum
Change in momentum ÷ time
Change in momentum × time
If an object with a mass of 12 kilograms is moving at 10 metres per second, what is its momentum?
120 kg m/s
120 kgms
1.2 kg m/s
If an object undergoes a change in momentum of 10 kg m/s in 3 seconds what is the force?
3.3 kg m/s
3.3 N
3.3 s
Newton's Second Law of Motion can be summarised by which equation?
\[{\text{m}}=\frac{\text{F}}{\text{a}}\]
\[{\text{F}}={\text{ma}}\]
\[{\text{F}}=\frac{\text{m}}{\text{a}}\]
What does Newton's Third Law of Motion state?
Objects with balanced forces acting on them will stay at rest or in constant motion
If A exerts a force of B, then B exerts an equal but opposite force on A
What can the moment of a force be calculated by?
Force × distance
Force ÷ distance
Force × distance2