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Meryn is driving in her car. At one point, there is a forward force of 3700 N from the engine, and a backward force of
Meryn is driving in her car. At one point, there is a forward force of 3700 N from the engine, and a backward force of 3700 N from friction and drag. If no other forces are acting on the car, which statement describes the car's motion at this point? O The car's speed is increasing. O The car is moving at constant speed, but changing direction. O The car is not changing speed or direction. O The car's speed is decreasing. Question 20 4 pts Kendra and her brother are pushing a stalled car. At one point, the forces acting on a the car are the following: a gravitational force of 17, 400 N downward, a normal force of 17, 400 N upward, Kendra's pushing force of 235 N southward, her brother's pushing force of 223 N southward, and a friction force of 458 N northward. Which of the following statements is accurate? O There is a net force of 35, 716 N acting on the car. O There is a net force of 916 N acting on the car. O There is no net force acting on the car. O There is a net force of 458 N acting on the car.Keller is pushing a pallet jack through a warehouse. The pallet jack has a total mass of 107 kg. In order to maintain a constant velocity, Keller must push with a force of 128.1 N. What is the coefficient of kinetic friction between the pallet jack and the ground? O Ak = 0.24 O Ak = 0.12 O Ak = 0.19 O /k = 0.84 Question 14 4 pts Terry is standing in an elevator on a scale. At one point in the elevator ride, he measures that his apparent weight is 924 N. His actual weight is 892 N. Which of the following best describes the motion of the elevator? O The elevator is accelerating upwards at 0.35 m/s2 O The elevator is accelerating downwards at 1.04 m/s2 The elevator is accelerating upwards at 1.04 m/s2 O The elevator is accelerating downwards at 0.35 m/s2A 64 kg baseball player jumps into the air throws a 151 g baseball directly eastward with a force of 8.4 N. What is the force that the ball exerts on the player? O 8.4 N to the east O 1.3 N to the east O 1.3 N to the west O 8.4 N to the west Question 16 4 pts Oscar places a 7.66 kg box on a 33 ramp. The box accelerates at a rate of 0.64 m/52. What is the coefficient of kinetic friction between the box and the ramp? O 0.50 O 0.70 O 0.58 O 0.61
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