If Hannah slows down from a speed of 12 m/s to 8 m/s and has a mass of 45kg, how much force has been exerted on her to cause this deceleration?
Since force = mass x acceleration, acceleration = 4 as the change in velocity is 4 m/s and m = 45 as the mass of Hannah is 45 kg and hence the force required to be exerted on her is 4*45 which is 180N.
MA
Related Physics GCSE answers
All answers ▸A musical instrument produces a sound wave with a frequency of 1000 Hz. The sound wave has a wavelength of 0.34 m in air. Calculate the speed of the sound wave in air.
What is the difference between A.C. and D.C.?
Describe a simple experiment to determine the speed of sound in air.
State one advantage and one disadvantage of using a CT scanner, compared with ultrasound scanning, for forming images of the inside of the human body. (2 Marks)