Review Assignment on Physics First Course

1. A rock is thrown vertically upwards at the edge of a cliff. The initial velocity is 13.9 m/s, and

the rock lands at the base of the cliff 7.1 s later. How high is the cliff? (2 marks)

2. A boat is moving at 6.3 m/s bearing 140^o according to the compass. The boat is in an ocean

current that flows at 3.1 m/s [N 60^o E]. What is the velocity of the boat with respect to the

water? (2 marks)

3. A car of mass 1500.0 kg is moving in a circular path of radius 100.0 m at a speed of 22.2 m/s.

While maintaining the circular path, the car accelerates uniformly to a speed of 30.6 m/s in 4.0 s.

What is the magnitude of the force on the car 2 s after the acceleration begins? (5 marks)

4. For the diagram shown, what is the acceleration of the 10 kg box? (5 marks)

5. Mars has a mass of 6.37 X 10²³ kg, and radius of 3.43 X 10⁶m. The period of rotation of

Mars is 8.85 X 10⁴ s. How high above the surface of Mars must a satellite be placed to have

a synchronous orbit? (3 marks)

6. The mass of an object suspended by a spring is 0.82 kg. The spring has a spring constant of

100.0 N/m. What is the natural period of oscillation of the object? (3 marks)

7. A water wave of wavelength 5.8 m strikes a barrier with two openings in it. The second nodal

line is formed at an angle of 50.0^o. What is the separation of the openings? (2 marks)

8. At a track race, the air temperature is 28^o C. If the crowd is 96.3 m from the starting gun,

how much time will it take for the sound to reach the crowd? (3 marks)

9. A car is traveling towards you with a speed of 90.0 km/h when the horn is sounded. The horn

has a frequency of 400.0 Hz when the car is stationary. If the speed of sound is 340 m/s, what

is the frequency of the sound reaching you? (3 marks)

10. A candle of height 4.8 cm is placed 38.6 cm in front of a converging mirror with curvature

30.2 cm. What is the height of the image? (3 marks)

11. Light passes through a slit of width 3.2 X 10^-5 m and produces a second order maximum at an

angle of 20.0^o. What is the wavelength of the light? (2 marks)