How to solve these two physics questions?

1.

Question: A block is placed on an inclined plane as shown in Figure 1. The block has a mass m = 1.79 kg. The angle 6 is slowly increased. When 6 : 44.8 the block starts to slide down the inclined plane. When the block has travelled 1.00 In along the slope it has a speed of v = 0.528 111/8. 6 Figure 1: A block of mass m resting on an inclined plane angled at 6 degrees to the horizontal. The plane slopes upwards from left to right. Part 1) What is the net force acting on the block as it starts to slide? _) Fnet = N Part 2) What is the coefcient of static friction between the block and the slope? #5: Part 3) What is the coefcient of kinetic friction between the block and the slope? Mk: Question: A body with a mass of 1.48 kg has a speed of U,- = 2.281m/S at t = 0 when it is at (5.18, 7.15). A constant force, 1? = 8.073 + 1.833, acts on the body. Part 1) What is the initial kinetic energy of the body? K = 3.85 J Your last answer was interpreted as follows: 3.85 Part 2) In unit vector notation, write an expression for the position of the body with time. Simplify then evaluate your expression as much as possible. A position: 2.73*t"2+2.28*t+5.'|8 i+ O.62*t"2+7.15 j Your last answer was interpreted as follows: 2.73 - 1'2 + 2.28 - t + 5.18 The variables found in your answer were: [1'] Your last answer was interpreted as follows: 0.62 - 2'2 + 7.15 The variables found in your answer were: [I] Part 3) How much work is done by the force on the object in the first 2.00 seconds? W: J