Period 2Question 1

A heavy steel ball B is suspended by as cord from a block of wood W. The entire system is dropped. The tension in the cord is:(neglect the air resistance)

1. the difference in the masses of B and W

2. the difference in the weights of B and W

3. the weight of B

4. zero

5. None of the above

Period 2Question 2

A car skids with its wheels locked trying to stop on an icy road.The force of friction between the icy road and the tires will be:

1. Greater than the normal force on the road times the coefficient of static friction

2. Equal to the normal force on the road times the coefficient of static friction

3. Less than the normal force of the road times the coefficient of static friction

4. Greater than the normal force of the road times the coefficient of kinetic friction

5. None of the above

Period 3Question 1

Equal forces act on isolated bodies A and B. The mass of B is 3 times that of A. The magnitude of the acceleration of

A is:

1. 3 times that of B2. 1/3 times that of B3. The same as B 4. 9 times that of B5. 1/9 times that of B

Period 3 Question 2

A brick slides on a horizontal surface. Which of the following will increase the frictional force on it:

1. Putting a second brick on top of it

2. Decreasing the surface area of contact

3. Increasing the surface area of contact

4. Decreasing the mass of the brick

5. None of the above