Question 7 1 pts A 1 kg block begins sliding up a 30 inclined plane with an initial velocity of 4.0 m/s. How far will the block go up the plane if the surface is rough and the coefficient of kinetic friction between the block and the plane is 0.20. 1.8 m 1.2 m 1.4 m 1.5 m Question 8 1 pts A 50 kg mass is resting on a plane that is inclined at 15 degrees above the horizontal. A 250 N forces is applied to the mass, up the inclined plane, but the mass does not move. Determine the coefficient of static friction between he mass and the plane. 0.260 0.566 0.510 0.528 Question 9 1 pts An Atwood machine, consisting of two masses m and m2 are connected by rope over a massless, frictionless pulley. If m = 10 kg and m = 20 kg, determine the acceleration of the masses. (Assume the rope is massless) 2.44 m/s 3.27 m/s 2.79 m/s 2.05 m/s Question 4 1 pts A 1 kg block starts sliding up a frictionless 30 inclined plane with an initial velocity of 4.0 m/s. How far does the block go up the ramp before coming to rest? O 1.63 m 2.16 m O 1.56 m 1.79 m