
3. Acoustics- lesson 3 - Force and friction
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Others
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University
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Easy
Mohamed Mahmoud
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27 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does Newton's First lae state?
Force equals mass times velocity
For every action, there is an opposite reaction
An object remains at rest or moves at constant speed unless acted on by a force
Energy is conserved in closed systems
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Inertia is
A type of friction
Resistance due to heat
The tendency of an object to maintain its motion
The rate of change of velocity
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is the correct SI unit of force?
Erg
Newton
Dyne
Watt
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the formula for force?
F = m * a
F = m / v
F = a / m
F = v * t
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Friction is best described as
A form of kinetic energy
A type of mass
A force that oppose motion
A scalar quantity
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens if net force = 0?
Object must move
Acceleration increases
Motion stays unchanged
Velocity becomes zero
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A 2 kg object is accelerating at 3 m/s2. What is the force?
6 m
6 N
1.5 N
3.5 kg
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