Physics 5 (Additional Applications of Newton's Laws)

Quiz8: Q3 The questions refer to the following diagram. A stunt motorcyclist rides through a track a part of which is a vertical circle as shown in the diagram of radius r= 6.0m. The combined mass of the motorcycle plus rider is 550kg. If the motorcycle passes through point B (see diagram) travelling at a speed of 10m/s, the force exerted by the track on the motorcycle at that instant is closest to: A) 10,000N B) 5,000N C) 15,000N D) 20,000N E) 2,500N

A) 10,000N

Quiz7: Q3 Someone is pushing a packing case of mass 30 kg up an inclined slope of angle as shown in the diagram above. The coefficient of kinetic friction between the case and the slope is μk = 0.100 and the coefficient of static friction is μs = 0.200. The maximum force that the person can apply parallel to the slope without causing the crate to move is closest to: A) 59 N B) 118 N C) 29 N D) 136 N E) 88

B) 118 N

Quiz8: Q1 The questions refer to the following diagram. A stunt motorcyclist rides through a track a part of which is a vertical circle as shown in the diagram of radius r= 6.0m. The combined mass of the motorcycle plus rider is 550kg. What is the minimum possible speed in m/s of the motorbike at C? A) 60 B) 7.7 C) 11 D) 13 E) None of the previous responses give the correct minimum speed

B) 7.7 m/s

Quiz7: Q2 Someone is pushing a packing case of mass 30 kg on an inclined slope of angle as shown in the diagram above. The coefficient of kinetic friction between the case and the slope is μk = 0.100 and the coefficient of static friction is μs = 0.200. Once the case has begun to slide down the slope, what force must the person apply parallel to the slope to allow the case to continue sliding down at constant speed? A) 59 N B) 118 N C) 29 N D) 136 N E) 88 N

C) 29 N

Quiz8: Q4 The questions refer to the following diagram. A stunt motorcyclist rides through a track a part of which is a vertical circle as shown in the diagram of radius r= 6.0m. The combined mass of the motorcycle plus rider is 550kg. If the motorbike passes through point C at a speed of 10m/s, which of the following is closest to the magnitude of the normal force exerted by the track on the motorbike? A) 10,000N B) 15,000N C) 3,500N D) Zero E) 5,000N

C) 3,500N

Quiz8: Q2 The questions refer to the following diagram. A stunt motorcyclist rides through a track a part of which is a vertical circle as shown in the diagram of radius r= 6.0m. The combined mass of the motorcycle plus rider is 550kg. If the motorcycle and rider passes through point A (see diagram) at a speed of 10m/s, the force exerted by the track on the motorcycle is closest to: A) 10,000N B) 2000N C) 5,500N D) 10,000N E) 15,000N

E) 15,000N

Quiz7: Q4 Someone is pushing a packing case of mass 30 kg up an inclined slope of angle as shown in the diagram above. The coefficient of kinetic friction between the case and the slope is μk = 0.100 and the coefficient of static friction is μs = 0.200. Once the crate is moving up the slope, the force that the person must apply parallel to the slope to allow the crate to continue to slide up the slope at constant speed is: A) 59 N B) 118 N C) 29 N D) 136 N E) 88 N

E) 88 N

Quiz7: Q1 Someone is pushing a packing case of mass 30 kg up an inclined slope of angle as shown in the diagram above. The coefficient of kinetic friction between the case and the slope is μk = 0.100 and the coefficient of static friction is μs = 0.200. The minimum force the person must apply parallel the slope to prevent the case from sliding down the slope (i.e., just to keep it in equilibrium, at rest) is closest to: A) 59 N B) 120 N C) 152 N D) 32 N E) Zero

E) Zero