Q- A loaded penguin sled weighing 90 N rests on a plane inclined at angle θ = 30° to the horizontal. Between the sled and the plane, the coefficient of static friction is 0.27 and the coefficient of kinetic friction is 0.20.
(a) What is the minimum magnitude of the force F, parallel to the plane,…
Q- The floor of a railroad flatcar is loaded with loose crates having a coefficient of static friction of 0.48 with the floor. If the train is initially moving at a speed of 54 km/h, in how short a distance can the train be stopped at constant acceleration without causing the crates to slide over th…
Q- A box sits on a horizontal wooden ramp. The coefficient of static friction between the box and the ramp is 0.43. You grab one end of the ramp and lift it up, keeping the other end of the ramp on the ground. What is the angle between the ramp and the horizontal direction when the box begins to sli…
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