NY Regents June 2007, Part 1
1 Which is not a vector quantity?
2 An astronaut standing on a platform on the Moon drops a hammer. If the hammer falls 6.0 meters vertically in 2.7 seconds, what is its acceleration?
3 A 2.00-kilogram object weighs 19.6 newtons on Earth. If the acceleration due to gravity on Mars is 3.71 meters per second2, what is the object’s mass on Mars?
4 A car moves with a constant speed in a clockwise direction around a circular path of radius r, as represented in the diagram below.

When the car is in the position shown, its acceleration is directed toward the
5 As the angle between two concurrent forces decreases, the magnitude of the force required to produce equilibrium
6 A child walks 5.0 meters north, then 4.0 meters east, and finally 2.0 meters south. What is the magnitude of the resultant displacement of the child after the entire walk?
7 The diagram below represents a spring hanging vertically that stretches 0.075 meter when a 5.0-newton block is attached. The spring-block system is at rest in the position shown.

The value of the spring constant is
8 A 0.50-kilogram object moves in a horizontal circular path with a radius of 0.25 meter at a constant speed of 4.0 meters per second. What is the magnitude of the object’s acceleration?
9 Which situation will produce the greatest change of momentum for a 1.0-kilogram cart?

10 Earth’s mass is approximately 81 times the mass of the Moon. If Earth exerts a gravitational force of magnitude F on the Moon, the magnitude of the gravitational force of the Moon on Earth is
11 The table below lists the mass and speed of each of four objects.

Which two objects have the same kinetic energy?
12 A horizontal force of 5.0 newtons acts on a 3.0-kilogram mass over a distance of 6.0 meters along a horizontal, frictionless surface. What is the change in kinetic energy of the mass during its movement over the 6.0-meter distance?
13 Which quantity is a measure of the rate at which work is done?
14 The diagram shows two bowling balls, A and  B, each having a mass of 7.00 kilograms, placed 2.00 meters apart.

What is the magnitude of the gravitational force exerted by ball A on ball B?
15 If 1.0 joule of work is required to move 1.0 coulomb of charge between two points in an electric field, the potential difference between the two points is
16 The current through a 10.-ohm resistor is 1.2 amperes. What is the potential difference across the resistor?
17 A copper wire of length L and cross-sectional area A has resistance R. A second copper wire at the same temperature has a length of 2L and a cross-sectional area of ½A. What is the resistance of the second copper wire?
18 A 6.0-ohm lamp requires 0.25 ampere of current to operate. In which circuit below would the lamp operate correctly when switch S is closed?

19 What is the total current in a circuit consisting of six operating 100-watt lamps connected in parallel to a 120-volt source?
20 A 4.50-volt personal stereo uses 1950 joules of electrical energy in one hour. What is the electrical resistance of the personal stereo?