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P5: Quiz 20 – Answers
P5: Quiz 20 – Answers
1)
a) p = mv or momentum = mass x velocity
momentum is measured in kilogram metres per second (kg m/s), mass is measured in kilograms (kg) and velocity is measured in metres per second (m/s)
a) p = mv or momentum = mass x velocity
momentum is measured in kilogram metres per second (kg m/s), mass is measured in kilograms (kg) and velocity is measured in metres per second (m/s)
b) Momentum is a vector quantity as it has direction and magnitude
c) The momentum of all stationary objects is 0 kg m/s
2) 245 kg m/s
3) 0.322 kg m/s
4) 1,550 kg
5) 6 m/s
6) 86,800 kg m/s
7) 60 g
c) The momentum of all stationary objects is 0 kg m/s
2) 245 kg m/s
3) 0.322 kg m/s
4) 1,550 kg
5) 6 m/s
6) 86,800 kg m/s
7) 60 g
Questions
1)
a) Write down the equation for momentum. Give the units for all of the variables.
b) Is momentum a vector or scalar quantity? Explain your answer.
c) What is the momentum of a stationary object?
2) An ice skater has a mass of 70 kg and a velocity of 3.5 m/s. Calculate the momentum of the ice skater.
3) A snooker ball has a mass of 140 grams and a velocity of 2.3 m/s. Calculate the momentum of the snooker ball.
4) When a car is travelling at a velocity of 25 m/s it has a momentum of 38,750 kg m/s. Calculate the mass of the car.
5) The mass of a person and their bike is 92.5 kg. When they are travelling at an unknown velocity, the person and their bike have a momentum of 555 kg m/s. Calculate the velocity that the cyclist is travelling at.
6) A van has a mass of 3,500 kg. Calculate the momentum of the van when it is travelling at a velocity of 24.8 m/s.
7) A stone is fired out of a slingshot. As soon as the stone leaves the slingshot, it has a velocity of 42 m/s and a momentum of 2.52 kg m/s. Calculate the mass of the stone. Give your answer in grams.
1)
a) Write down the equation for momentum. Give the units for all of the variables.
b) Is momentum a vector or scalar quantity? Explain your answer.
c) What is the momentum of a stationary object?
2) An ice skater has a mass of 70 kg and a velocity of 3.5 m/s. Calculate the momentum of the ice skater.
3) A snooker ball has a mass of 140 grams and a velocity of 2.3 m/s. Calculate the momentum of the snooker ball.
4) When a car is travelling at a velocity of 25 m/s it has a momentum of 38,750 kg m/s. Calculate the mass of the car.
5) The mass of a person and their bike is 92.5 kg. When they are travelling at an unknown velocity, the person and their bike have a momentum of 555 kg m/s. Calculate the velocity that the cyclist is travelling at.
6) A van has a mass of 3,500 kg. Calculate the momentum of the van when it is travelling at a velocity of 24.8 m/s.
7) A stone is fired out of a slingshot. As soon as the stone leaves the slingshot, it has a velocity of 42 m/s and a momentum of 2.52 kg m/s. Calculate the mass of the stone. Give your answer in grams.