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(a) Is the reference frame of the train now an inertial frame? Design an experiment that allows you to find out. (3 marks)
(b) Draw a free-body diagram of the man. Label the forces appropriately and explain their physical origin (one line each will suffice). (3 marks)
(c) If the coefficient of friction between the man’s shoes and the ‘floor’ of the train is μ = 0.1, what is the maximum time that the man takes to hit the back of the train carriage? For simplicity, you can assume that the coefficient of static friction is the same as the coefficient of kinetic friction. Assume that there are no obstacles between the man and the back of the train. (4 marks)
(d) How does your answer change if the coefficient of friction is 0.3 instead? Ex-
I need an illustration and complete solution. Thank you
I need an illustration and complete solution. Thank you
If the magnitude of the sum of two vectors is less than the magnitude of either vector, then:
A man of mass 80 kg is standing stationary in the middle of a train carriage (see the figure below). The train is moving horizontally with a constant speed of 20 m/s (see the figure below), and the carriage is L = 20 m long. Suddenly, the train starts to accelerate uniformly with a = 2 m/s2 horizontally. Is the reference frame of the train now an inertial frame? Design an experiment that allows you to find out. Draw a free-body diagram of the man. Label the forces appropriately and explain their physical origin (one line each will suffice). If the coefficient of friction between the man’s shoes and the ‘floor’ of the train is µ = 0.1, what is the maximum time that the man takes to hit the back of the train carriage? For simplicity, you can assume that the coefficient of static friction is the same as the coefficient of kinetic friction. Assume that there are no obstacles between the man and the back of the train. How does your answer change if the coefficient of friction is 0.3 instead?
A 4kg mass is attached to a k=350 N/m spring then compressed 50cm then released(see diagram below). It travels through equilibrium to a point 20 cm right of equilibrium where it makes a e= 0.75 collision with a stationary 2 kg mass. Find
a) the speeds of the masses after the collision
The 4 kg remains on the spring and now moves in SHM.
b) find the amplitude of this SHM
c) find the initial phase of the SHM (t=0 is the instant after collisio
