50N 60N What is the force exerted on the upper block by the lower string? Zero 10N downward 20 N downward 10 N upward 20 N upward A student of mass 100Kg is standing on a scale in an elevator car. The elevator is accelerating downward at 5.0m/s2 near the surface of the Earth. What approximate value does the scale read? 500N 1000N 50N 150N 1500N Complete the following statement: The term net force most accurately describes The mass of the object The inertia of the object The quantity that has a tendency to change the velocity of an object The quantity that keeps an object moving The quantity that causes displacement A force F gives an object with mass m and acceleration a. If this force is applied to an object of mass ¼m, what is the new acceleration? (1/2)*a 2a 8a (1/4)*a 4a The velocity of a 5.0N hockey puck sliding across a level ice surface decreases at the rate of 0.5m/s2. What is the coefficient of kinetic friction between the puck and the ice? 0.05 0.10 0.50 0.00 0.25 For the next two questions. A 200.0N box is pulled to the right at a constant speed by a 100.0N force acting at an angle with respect to the horizon as shown. of 30.0° The normal force exerted on the block is most nearly equal to 113N 200N 287N 150N 250N The coefficient of kinetic friction between the box and the floor is most nearly equal to 0.58 0.43 Zero 0.50 0.25 At a given instant, the acceleration of a particle is zero. That means that the velocity of the particle is Constant Decreasing Zero Increasing Changing direction The velocity-time graph above represents the motion of a 5Kg box. The only force applied to this box is a person pushing. Assuming that the box is moving to the right, what is the magnitude and direction of the force applied by the person pushing?
50N 60N What is the force exerted on the upper block by the lower string? Zero 10 N upward 10N downward 20 N upward 20 N downward A student of mass 100Kg is standing on a scale in an elevator car. The elevator is accelerating downward at 5.0m/s2 near the surface of the Earth. What approximate value does the scale read? 500N 150N 1000N 1500N 50N Complete the following statement: The term net force most accurately describes The mass of the object The inertia of the object The quantity that has a tendency to change the velocity of an object The quantity that keeps an object moving The quantity that causes displacement A force F gives an object with mass m and acceleration a. If this force is applied to an object of mass ¼m, what is the new acceleration? (1/2)*a (1/4)*a 2a 4a 8a The velocity of a 5.0N hockey puck sliding across a level ice surface decreases at the rate of 0.5m/s2. What is the coefficient of kinetic friction between the puck and the ice? 0.05 0.00 0.10 0.25 0.50 For the next two questions. A 200.0N box is pulled to the right at a constant speed by a 100.0N force acting at an angle of 30.0° with respect to the horizon as shown. The normal force exerted on the block is most nearly equal to 113N 150N 200N 250N 287N The coefficient of kinetic friction between the box and the floor is most nearly equal to 0.58 0.50 0.43 0.25 Zero At a given instant, the acceleration of a particle is zero. That means that the velocity of the particle is Constant Increasing Decreasing Changing direction Zero The velocity-time graph above represents the motion of a 5Kg box. The only force applied to this box is a person pushing. Assuming that the box is moving to the right, what is the magnitude and direction of the force applied by the person pushing?
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