1 What equation is used to calculate momentum?
2 What equation links the resultant force with the change in momentum it produces?
3 When a resultant force acts for 3 seconds on the trolley below, its velocity increases to 6 m/s.
a What is the momentum of the trolley before the force acts?
b What is the momentum after the force has acted?O
c What is the change in momentum?
d What is the change in momentum every second?
e What is the resultant force on the trolley?Now you will calculate the resultant force on the trolley using different steps:
f What is the trolleys change in velocity?
g What is the trolleys acceleration?
h What equation links force, mass, and acceleration?
i What is the resultant force on the trolley?
4. A jet engine pushes out 50 kg of gas (mainly air) every second, at a velocity of 150 m/s.
a What thrust (force) does the engine produce?
b If the engine pushed out twice the mass of gas at half the velocity, what would the thrust be?