Work is said to be done when:

Force is applied, and displacement occurs in the direction of the force

Work done is Zero when:

Force is perpendicular to displacement

A simple machine is a device that:

Reduces work, Change the direction or magnitude of force

Which of the following statements about machines is true?

Machine make work easier by changing force, distrace, or direction.

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Work and Machines

13 termsStudBud Administration

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Questions 13

Answers

1
Work is said to be done when:
Displacement occurs without any force
Force is applied but there is no displacement
None of the above
Force is applied, and displacement occurs in the direction of the force
2
The Mechanical advantage (MA)of a machine is the ratio of:
Output force
Input force to output force
Distance moved by effort to distance
Work output to work input
3
A Machine always does more work than the force applied to it
False
True
4
In science, work is force applied through
Movement
distance
writing
Muscle
5
Power is defined as :
Force applied per unit time
None of the above
Energy stored in a system
Work done per unit time
6
Work done is Zero when:
Both A and B
Displacement occurs
Force is perpendicular to displacement
Force is applied but in the opposite direction of displacement
7
the SL unit of work is:
Joule
Pascal
Watt
Newton
8
A ramp is considered a simple machine, to apply a smaller force over a longer distance to lift a heavy objects
False
True
9
A simple machine is a device that:
Reduces work
Creates energy
Does not obey the laws of physics
Change the direction or magnitude of force
10
A simple machine that helps lift heavy objects by changing the direction of the force applied is called a:
Inclined plane
Lever
Pulley
Wheel and axle
11
The SL unit of power is:
Joule
Watt
Pascal
Newtom
12
Which of the following is NOT a key component of work in physics?
Direction of the force applied
Distance moved in the direction of the force
Time taken to move the object
Force applied
13
Which of the following statements about machines is true?
Machines' eliminate the need for work entirely
Machine decrease the amount of work needed
Machine create energy to do work
Machine make work easier by changing force, distrace, or direction.

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