Newton's 2nd law Herr
A 50.0 N box is at rest on a horizontal surface. The coefficient of static friction between the box and the surface is 0.50, and the coefficient of kinetic friction is 0.30. A horizontal 20.0 N force is then exerted on the box. The magnitude of the acceleration of the box is most nearly
0 m/s2
A total force is applied to a 1 kg block and its acceleration is 5.0 m/s2. When the same total force is applied to a box, its acceleration is five times as much. What is the mass of the box?
0.2 kg
An elevator carrying a person of mass m is moving upward and slowing down. How does the magnitude F of the force exerted on the person by the elevator floor compare with the magnitude mg of the gravitational force? A.)F < mg B.)F = mg C.)F > mg D.)F can be greater or less than mg, depending on the speed of the elevator.
A.) F < mg
Two objects, A and B, move toward one another. Object A has twice the mass and half the speed of object B. Which of the following describes the forces the objects exert on each other when they collide and provides the best explanation? A.)The force exerted on A by B will be twice as great as the force exerted by B on A, because A has twice the mass of B. B.)The force exerted by A on B will be half as great as the force exerted by B on A, because A has half the speed of B. C.)The forces exerted by each object on the other are the same, because interacting objects cannot exert forces of different magnitude on each other. D.)The forces exerted by each object on the other are the same, because the product of mass and speed is the same for both objects.
C.) The forces exerted by each object on the other are the same, because interacting objects cannot exert forces of different magnitude on each other.
A force is applied to object 1, causing the object to accelerate. The same force is applied to an object 2, which has a greater mass than object 1. Which statement is true?
Object 1 will have a greater acceleration than object 2.
A box slides down a hill with a constant velocity. Select the two true statements.
The magnitude of the normal force is less than the weight. The magnitude of the friction force is less than the weight.
A bucket is being lowered by a very light rope with a constant downward velocity. The tension the rope must be...
equal to the weight of the bucket.
A crate is sliding down an inclined ramp at a constant speed of 0.55 m/s. The vector sum of all the forces acting on this crate must point
none of the other choices are correct
