Exam 4: Newtons Second Law of Motion

A sack of potatoes weighing 200 N falls from an airplane. As the velocity of fall increases, air resistance also increases. When air resistance equals 200 N, the sack's acceleration becomes

When you stand at rest with your left foot on one bathroom scale and your right foot on a similar scale, each of the scales will

If an apple experiences a constant net force, it will have a constant

If more horizontal force is applied to a sliding object than is needed to maintain a constant velocity, the object

Which has zero acceleration? An object

A heavy ball hangs by a string, with a second string attached to its bottom (Figure 4.8 in your book). A quick pull on the bottom string breaks the

A car traveling at 22 m/s comes to an abrupt halt in 0.1 second when it hits a tree. What is the deceleration of the car?

A bowling ball and a baseball accelerate equally when falling in a vacuum because

A ball is thrown vertically into the air. Because of air resistance, its speed when it returns to its starting level compared with its initial speed is

A constant net force on a rail-road car produces constant

Recall Galileo's Leaning Tower experiment. With negligible air resistance, a heavy and a light object fall

A 10-kg brick and a 1-kg apple are dropped in a vacuum. The force of gravity on the brick is

A 1-kg ball is thrown at 10 m/s straight upward. Neglecting air resistance, the net force that acts on the stone when it is halfway to the top of its path is about

A ball is thrown vertically into the air. Because of air resistance, its time coming down compared to its time going up is

An object released from rest on another planet requires one second to fall a distance of 6 meters. What is the acceleration due to gravity on this planet?

If the mass of a cart is quickly loaded to have twice the mass while a propelling force remains constant, the cart's acceleration

A boulder following a straight-line path at constant velocity has

When the bottom string is pulled slowly in the heavy-ball-and-strings demonstration (Figure 4.8 in your book), tension