1) A baseball player slides into third base with an initial speed of 3.6 m/s. If

Question

1) A baseball player slides into third base with an initial speed of 3.6 m/s.

If the coefficient of kinetic friction between the player and the ground is 0.49, how far does the player slide before coming to rest?

2)A child goes down a playground slide with an acceleration of 1.16 m/s2 .

Find the coefficient of kinetic friction between the child and the slide if the slide is inclined at an angle of 35.0

below the horizontal.

3) When you push a 1.80-kg book resting on a tabletop, it takes 1.60 N to start the book sliding. What is the frictional force exerted on the book when you push on it with a force of 0.70 N

4) When you take your 1400-

kg car out for a spin, you go around a corner of radius 55 m with a speed of 19 m/s . The coefficient of static friction between the car and the road is 0.88.

Assuming your car doesn't skid, what is the force exerted on it by static friction? explain answer in two sig figs.

Explanation / Answer

1] By third equation of motion, s= v^2/2a where a = ug = 0.49*9.8

= 3.6^2/[2*0.49*9.8]

= 1.35 m answer

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