Physics Questions Practice Question and Answer
3 4 Q:
63c7a8631e8e3f3e1a3590ed 4 Q:
649aa3043662c8741dfd960b Answer : 1. "Newton is a unit of force."
4 Q:
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Q: Why do the astronauts in the international space station experience weightlessness?
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63c7a8631e8e3f3e1a3590ed- 1The acceleration due to gravity at that height is Zerofalse
- 2They are falling towards the earthtrue
- 3They have specially designed spacesuits for this purposefalse
- 4The gravity of the moon and earth cancel out at that altitudefalse
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Answer : 2. "They are falling towards the earth"
Q: Identify the correct statement.
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649aa3043662c8741dfd960b- 1Newton is a unit of force.true
- 2Newton is a unit of power.false
- 3Joule is a unit of force.false
- 4Joule is a unit of power.false
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Answer : 1. "Newton is a unit of force."
Explanation :
1. Newton is the SI unit of force. It is a unit force that causes an acceleration of one meter per second on one kilogram of mass.
- Force can be defined as:
Force =Mass x Acceleration
2. Joule is the SI unit of energy and work. It is the unit work done by one Newton force over a distance of one meter.
- Energy can be defined as:
Energy = Work x Time
Q: What makes a virtual image of a real object?
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5f6da2bdec13dd748004c084- 1convex mirrorfalse
- 2plane mirrortrue
- 3concave mirrorfalse
- 4All of thesefalse
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Answer : 2. "plane mirror"
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