Quiz II Name 2. Section PHY 201-.. 1. Calculate the force acting on the crate of
ID: 1771957 • Letter: Q
Question
Quiz II Name 2. Section PHY 201-.. 1. Calculate the force acting on the crate of mass 10.00 kg if it accelerates fromO to 20in time 10 s. Friction is negligible. Cpts) (2pts a) F=2.101 N b) F 20-10 N c) F 20 N d) F-21.0 N calculate the acceleration of the object of mass 15.00 kg the friction factor -0.100 ees Pets 2, ( a) a=0.66 b) a=1.6 c) a-6.60-10m d) a-8.9 Redraw picture above and draw all forces acting on the black object from the previous problem. Try to keep ratio of magnitude for all forces you are going to draw. (5 sts 3.Explanation / Answer
a) F = ma
F = 10 (20-0)/10 = 20 N
Q.2 )ma = mg sin theta - mu ( mg cos theta)
a= 9.8 sin 30 - (0.1) (9.8) cos 30 = 4.9 -0.849 = 4.05 m/s^2 ( if the object is coming down)
a= 9.8 sin 30 + (0.1) (9.8) cos 30= 5.749 m/s^2 ( if the object is going up)
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