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True or False: Mass is another term for weight. True False

False

True or False: The mass of an object (near the earth's surface) is equal to the magnitude of the gravitational force that the earth exerts on that object. True False

False

It is possible for the net force on an object to be zero, even if there are several non-zero forces acting on it. True False

True

A box slides down a frictionless plane inclined at an angle θ above the horizontal. The gravitational force on the box is directed vertically. parallel to the plane in the same direction as the movement of the box. parallel to the plane in the opposite direction as the movement of the box. perpendicular to the plane. at an angle θ below the inclined plane.

vertically.

A friend of yours is standing while facing forward in a moving train. Your friend suddenly falls forward as the train comes to a rapid stop. Which force pushes your friend forward during the stop? The forward friction force between your friend and the train's floor. No forward force is acting on your friend as the train stops. The forward force of inertia acting on your friend. The upward normal force due to your friend's contact with the floor of the train. The downard force of gravity.

No forward force is acting on your friend as the train stops.

Which of the following statements best describes what happens during a collision of a 10-ton truck and a 1000-lb car, where the car experiences a lot of damage? The car and the truck have the same magnitude of acceleration. The force on the truck due to the collision is slightly greater than the force on the car. The force on the truck due to the collision is exactly equal to the force on the car. The force on the car due to the collision is much greater than the force on the truck.

The force on the truck due to the collision is exactly equal to the force on the car.

A Boeing 737 is flying at a fixed altitude, at a constant speed. Choose the correct statement: The forward thrust on the plane from its engines is equal to the drag on the plane from the air. The forward thrust on the plane from its engines is less than the drag on the plane from the air. The forward thrust on the plane from its engines is greater than the drag on the plane from the air.

The forward thrust on the plane from its engines is equal to the drag on the plane from the air.

A Boeing 737 is flying at a fixed altitude while decreasing its speed. Choose the correct statement: The forward thrust on the plane from its engines is greater than the drag on the plane from the air. The forward thrust on the plane from its engines is equal to the drag on the plane from the air. The forward thrust on the plane from its engines is less than the drag on the plane from the air.

The forward thrust on the plane from its engines is less than the drag on the plane from the air.

A Boeing 737 is descending at a steady rate, at a constant speed. Choose the correct statement: The lift force acting from the air onto the plane's wings is equal to the plane's weight. The lift force acting from the air onto the plane's wings is greater than the plane's weight. The lift force acting from the air onto the plane's wings is less than the plane's weight.

The lift force acting from the air onto the plane's wings is equal to the plane's weight.

A Boeing 737 is descending at a decreasing rate, while flying at a constant speed. Choose the correct statement: The lift force acting from the air onto the plane's wings is greater than the plane's weight. The lift force acting from the air onto the plane's wings is equal to the plane's weight. The lift force acting from the air onto the plane's wings is less than the plane's weight.

The lift force acting from the air onto the plane's wings is greater than the plane's weight.

An object is moving forward with a constant velocity. What statement about this object MUST be true? The net force on the object is in the forward direction. No forces are acting on the object. The net force on the object is zero. The acceleration of the object is in the forward direction.

The net force on the object is zero.

A 15 kg toolbox would have a smaller weight on the moon than it does on earth. True False

True

You swing a golf club and hit a heavy box with a force of 1200 N. The force the box exerts on the golf club is greater than 1200 N if the box moves. exactly 1200 N only if the box does not move. exactly 1200 N whether or not the box moves. less than 1200 N if the box moves. greater than 1200 N if the club bounces back.

exactly 1200 N whether or not the box moves.

Which of the following is a unit of mass? m/s2 lb N kg

kg

Two bodies P and Q on a smooth horizontal surface are connected by a light cord. The mass of P is greater than that of Q. A horizontal force of magnitude F is applied to Q as shown in the figure, accelerating the bodies to the right. zero greater than F. less than F but not zero. equal to F.

less than F but not zero.

Suppose you are playing hockey. Assume there is no friction between the ice and the hockey puck. You strike the puck as hard as you can. In the moments after the puck loses contact with your stick, the puck will start to slow down not slow down or speed up. speed up a little, and then move at a constant speed. speed up a little, and then slow down.

not slow down or speed up.

A penguin in a box is sliding up an icy slope. The direction of the velocity vector is shown. The only forces acting on the penguin and its box are the gravitational force from the earth, the normal force from the icy surface, and a small amount of friction from the icy surface. The direction of the friction force is: parallel to the slope, in the same direction as the velocity straight down perpendicular to the slope parallel to the slope, in the opposite direction as the velocity

parallel to the slope, in the opposite direction as the velocity

A penguin in a box is sliding up an icy slope. The direction of the velocity vector is shown. The only forces acting on the penguin and its box are the gravitational force from the earth, the normal force from the icy surface, and a small amount of friction from the icy surface. The direction of the normal force is: perpendicular to the slope straight down parallel to the slope, in the opposite direction as the velocity parallel to the slope, in the same direction as the velocity

perpendicular to the slope

A penguin in a box is sliding up an icy slope. The direction of the velocity vector is shown. The only forces acting on the penguin and its box are the gravitational force from the earth, the normal force from the icy surface, and a small amount of friction from the icy surface. The direction of the gravitational force is: straight down perpendicular to the slope parallel to the slope, in the opposite direction as the velocity parallel to the slope, in the same direction as the velocity

straight down

A stalled vehicle is being pushed up a hill at constant velocity by three people. The net force on the car is down the hill and greater than the weight of the car. down the hill and equal to the weight of the car. zero. up the hill and equal to the weight of the car. up the hill and greater than the weight of the car.

zero.