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A particle of mass ππ collides elastically with a particle of mass 3ππ which is at rest. In the
πΆπΆ βframe, the particle of mass ππ moves with speed 3 ππ/π π at an angle of 60ππ after the
collision. Find the final velocity for the mass ππ in the laboratory frame.
a body of mass 2kg initially at rest on a smooth horizontal plane is subjected to a horizontal forve of magnitude 1/2v+1. find the time when the velocity is 1ms
A mass is oscillating with amplitude π΄ at the end of the spring. How far is this mass from the equilibrium if the elastic potential energy equals πΎ times the kinetic energy?
A steam boiler has a total volume of 3m3.the boiler initially contains 2m3 of saturated steam and 1m3 of saturated liquid at 3mpa.calculaye the mass of vapour, mass of liquid, quality of steam and specific enthalpy of steam
An 85-kg runner is accelerating at a rate of 2 m/s^2 and a 65-kg runner at a rate of 3 m/s^2. If the heavier runner started at a speed of 1 m/s while the lighter runner started off stationary, then how long is it before the runners have the same momentum?
A 3500-kg car hits an 80-kg pedestrian who is standing in the middle of the road. Before the collision, the car was travelling at 30 km/h and the pedestrian was stationary. After the collision, the car was traveling at 28.5 km/h. At what speed will the pedestrian be flung down the road (in km/h)
I got this question on my hw and i chose 4 and it was wrong I would like if someone could explain why its wrong
A hockey stick hits a puck on the ice. Identify an action-reaction pair in this situation
1 The stick exerts a force on the puck; the puck exerts a force on the stick.
2 The puck exerts a force on the stick; the stick exerts a force on the ice.
3 The stick exerts a force on the ice; the ice exerts a force on the puck.
4 The stick exerts a force on the puck; the puck exerts a force on the ice.
Starting from rest, you travels to north between t=0s, t=5s with an acceleration 0.4 m/s^2. Next you drive to east between t=5s and t=10s with an acceleration of 1 m/s^2. Then you drives south between t=10s and t=20s with an acceleration of 0.6 m/s^2. What is your position and velocity after 20 s?
Explain second law of newton.
Explain newton first law.
