PHYS40110: Introductory Physics - The Brakes on a Motorcycle - Physics Assignment Help

Assignment Task:

Task:

Question 1 22 Marks
(a) The brakes on a motorcycle can stop the motorcycle from 70.0 kmh-1 in 3.00 seconds. Express your answers to the following with 3 significant figures. Remember to write down all knowns etc and convert to SI units.
(i) What is the acceleration? (2 marks)
(ii) What time would it take to slow to -1 45.0km hr ? (2 marks)
(iii) What displacement will it have travelled (since it started to decelerate) when it has come to a stop?

Question 1 (continued)
(b) It takes 40.0 N of force to just move a 15.0 kg chest of drawers on vinyl flooring.
(i) Calculate the coefficient of static friction. (2 marks)
(ii) If the coefficient of kinetic friction is 0.2, what is the force required to continue moving the chest of drawers?

(iii) If the initial force of 40.0 N is continued, how fast will the chest of drawers be moving after 4 seconds?

Question 1 (continued)
(c) A ball thrown straight up reaches a height of 90.0 cm and falls back to where it started.
(i) How long will it take for the ball to complete this journey? (Ignore wind resistance.)
(ii) What velocity will the ball have when it returns? (3 marks) (give the answer to both with 3 significant figures). Use 2 g ms

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