A golfer strikes a golf ball with a force of 8 kN. The ball and club are in contact for 0.5 ms. Calculate the change in momentum of the ball.1
SAMPLE ANSWER 3E Using Newton’s second law of motion, making sure all values are in their standard unit:
F mv mu t Qmv mu Ft
Change in momentum Ft 4 N s
The change in momentum of the ball is 4 N s. (8 103)(5 104)
MANDATORY EXPERIMENT 2
To Show that Acceleration is Proportional to the Applied Force (aF)
r
Ticker timer
Ticker tape
Newton weights
Trolley Runway Low-friction pulley
Newton weights Fig 3.3
Apparatus Ticker tape, ticker timer, trolley, sloped runway, metre stick, pulley, scale pan and Newton weights
Scale pan
1Change in momentum is often referred to as ‘Impulse’. It is a vector quantity with an SI unit of newton second (N s). It may be referred to using the symbol I for impulse, or p for change in momentum.The symbol is the Greek letter delta; it means ‘change in . . .’
