Use the following graph to answer questions 1 and 2.

 

 

1. At what time would the car be moving with the greatest velocity?

Use the following information to answer questions 6 and 7.

 

A frictionless air puck of mass m is placed on a plane surface inclined at an angle of 60^o with respect to the horizontal. A string of length L is attached to the puck at one end and the upper edge of the inclined plane at the other to constrain the movement of the puck.

 

 

6. What would be the magnitude of the normal force from the plane acting on the puck?

12. The circuit diagramed below is setup to measure the resistance R. The voltmeter has an internal resistance of 100 x 10³ ohms and the ammeter has an internal resistance of 0.10 ohms.

 

 

If the true value of R is 10 x 10³ ohms, what is the percent error in the calculated resistance found by dividing the reading on the voltmeter by the reading on the ammeter?

13. A block is sliding frictionlessly up a plane inclined at an angle of 45^o to the horizontal.

 

 

If at a given time the block's velocity is +25 m/s in the upward direction what is the velocity of the block 4.0 seconds later?

14. Three blocks (m₁, m₂ and m₃) are slid at constant velocity across a rough surface as shown below.

 

 

The coefficient of kinetic friction between each block and the surface is µ. What would be the force of m₁ on m₂?

Questions 17 and 18 refer to the situation shown in the accompanying diagram.

 

Two 5 kg masses are attached to opposite ends of a long massless cord which passes tautly over a massless frictionless pulley. The upper mass is initially held at rest on a table 50 cm from the pulley. The coefficient of kinetic friction between this mass and the table is 0.20.

 

 

17. When the system is released, its resulting acceleration is closest to which of the following:

20. What would be the equivalent capacitance of the circuit shown if each capacitor has a capacitance of C?