Physics Under Mr. Tan

25 Questions | By Thechadwictan | Last updated: Mar 20, 2022 | Total Attempts: 100

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This is part of your final exam in physics. The second half I will email to you. A two hour time limit is imposed. It is more than ample time to finish this quiz. If you have any other questions or comments, just contact me at 09163408463. . Please accomplish the exams before monday next week. . Thanks

Questions and Answers

1.

A .05 kg bullet is fired at a velocity of 500 m/s, and embeds itself in a block of mass 4 kg, initially at rest and on a frictionless surface. What is the final velocity of the block?
- A.
  
  6.17 m/s
- B.
  
  3.15 m/s
- C.
  
  10.0 m/s
- D.
  
  5.00 m/s
- E.
  
  4.00 m/s
2.

Momentum is
- A.
  
  Mass x acceleration
- B.
  
  Mass x velocity
- C.
  
  Pressure x volume
- D.
  
  Pressure divided temperature
- E.
  
  Mass times the speed of light
3.

Which of the following is not a simple machine?
- A.
  
  Wheel and axle
- B.
  
  Lever
- C.
  
  Typewriter
- D.
  
  Pulley
- E.
  
  Inclined plane
4.

The unit for work
- A.
  
  Newtons
- B.
  
  Joules
- C.
  
  Meters
- D.
  
  M/s^2
- E.
  
  Dynes
5.

A form of energy that is transferred by a difference in temperature
- A.
  
  Thermal energy
- B.
  
  Chemical energy
- C.
  
  Electrical energy
- D.
  
  Potential energy
- E.
  
  Kinetic energy
6.

Kinetic energy is maximum for a roller coaster
- A.
  
  At its lowest point
- B.
  
  At its highest point
- C.
  
  Somewhere in between
- D.
  
  When there is no velocity
- E.
  
  When there is no mass involved
7.

The capacity to do work
- A.
  
  Force
- B.
  
  Magnetism
- C.
  
  Kilowatts
- D.
  
  Electricity
- E.
  
  energy
8.

A force of 20 newtons pushing an object 5 meters in the direction of the force. How much work is done?
- A.
  
  1100 joules
- B.
  
  420 joules
- C.
  
  633 joules
- D.
  
  200 joules
- E.
  
  None of the above
9.

An example of Potential Energy would be
- A.
  
  A moving car
- B.
  
  A book resting on a table
- C.
  
  A speeding bullet moving horizontally
- D.
  
  None of the above
10.

An example of a system having both kinetic and potential energy would be
- A.
  
  A book resting on a table
- B.
  
  A piece of sugar
- C.
  
  An object in free fall
- D.
  
  A stretched rubber band
11.

What is the kinetic energy of an object moving at the speed of speed of light?
- A.
  
  224 j
- B.
  
  49 j
- C.
  
  593 j
- D.
  
  None of the above
12.

1 kg-m/sec/sec is equal to
- A.
  
  1 Newton
- B.
  
  1 pound
- C.
  
  1000 newtons
- D.
  
  None of the above
13.

What is the potential energy for a box weighing 100 newtons that is taken up to a height of 30 meters?
- A.
  
  33.3 j
- B.
  
  3000 j
- C.
  
  525 J
- D.
  
  None of the above
14.

A crank with a rope,a wheel,and an object can lift the object with ease
- A.
  
  Inclined plane
- B.
  
  Screw
- C.
  
  Wedge
- D.
  
  Pulley
- E.
  
  Lever
15.

According to Einstein, one kilogram of matter would give _____ joules of energy
- A.
  
  5.68 joules
- B.
  
  11.1 × 10^17 joules
- C.
  
  9.0 × 10^16 joules
- D.
  
  3.24 × 10^17 joules
16.

Calculate the power of a bike rider who is able to accelerate from rest to a speed of 13.4 in just 9.5 sec. We will assume that the biker is on level ground and that the combined weight of the biker and bike is 83.8 kg.
- A.
  
  202 W
- B.
  
  421 W
- C.
  
  355 W
- D.
  
  794 W
17.

Unit for momentum
- A.
  
  Kg m
- B.
  
  N m
- C.
  
  Kg
- D.
  
  M
18.

Change in momentum
- A.
  
  Force
- B.
  
  Work
- C.
  
  Power
- D.
  
  Impulse
19.

A truck is chasing a bicycle along a highway. Both have the same momentum. Which of the following is true?
- A.
  
  The truck will eventually overtake the bicycle.
- B.
  
  The bicycle will outrun the truck.
- C.
  
  The truck and bicycle have the same speed
- D.
  
  Not enough information is provided
20.

In a perfectly elastic collision
- A.
  
  No energy is lost in the system
- B.
  
  All the energy is used up in the system
- C.
  
  Some of the energy will be lost in the system
21.

Two ice skaters colliding with each other but moving as one body after the collision is an example of
- A.
  
  A perfectly elastic collision
- B.
  
  A case where the law of conservation of momentum is violated
- C.
  
  A perfectly inelastic collision
22.

Two ice skaters, Daniel (mass 65.0 kg) and Rebecca (mass 45.0 kg), are practicing. Daniel stops to tie his shoelace and, while at rest, is struck by Rebecca, who is moving at 13.0 m/s before she collides with him. After the collision, Rebecca has a velocity of magnitude 8.00 m/s at an angle of 53.1 degrees from her initial direction. Both skaters move on the frictionless, horizontal surface of the rink.What is the magnitude of Daniel's velocity after the collision?
- A.
  
  40 m /s
- B.
  
  32 m / s
- C.
  
  5 m /s
- D.
  
  None of the above
23.

Less power is required while slowly lifting a box than while lifting it up quickly.
- A.
  
  True
- B.
  
  False
24.

A simple machine may reduce the force required to do a task.
- A.
  
  True
- B.
  
  False
25.

The work required to lift a mass one meter depends on the speed at which it is raised.
- A.
  
  True
- B.
  
  False