1) A shoe sit on a ramp without moving. As the angle of the ramp is increased, the shoe starts to move. This is because:

a)the normal force has increased

b) the coefficient of static friction has decreased

c) the component of the normal force along the ramp has increased

d) the component of gravity acting along the plane of the ramp has increased

e) the component of gravity acting along the plane of the ramp has increased

2)A ball is attached to a string and whirled clockwise in a vertical circle. The tension in the string will be the lease:

a) at the bottom of the circle

b)at the top of the circle

c) as the ball is moving toward the top of the circle

d)as the ball is moving toward the bottom of the circle

e) Nowhere. Tension will be the same at all points in the circle