Materials MCQs (set 2)
Authored by Stalbans Physics
Physics
12th Grade
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10 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Two masses hang at rest from a spring, as shown in the diagram. The string separating the masses is burned through. Which of the following gives the accelerations of the two masses as the string breaks? [acceleration of free fall = g]
acceleration of 1 kg mass upwards in m·s-2: 3g, acceleration of 2 kg mass downwards in m·s-2: g
acceleration of 1 kg mass upwards in m·s-2: 2g, acceleration of 2 kg mass downwards in m·s-2: 2g
acceleration of 1 kg mass upwards in m·s-2: 2g, acceleration of 2 kg mass downwards in m·s-2: g
acceleration of 1 kg mass upwards in m·s-2: g, acceleration of 2 kg mass downwards in m·s-2: g
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
The equation for hydrostatic pressure, relating pressure to density, is p = hρg. How can both sides of this equation be written in terms of base units?
[N·m–1] = [m] [kg·m–3] [m·s–1]
[N·m–1] = [m] [kg·m–3] [m·s–2]
[kg·m–1·s–2] = [m] [kg·m–3] [m·s–2]
[kg·m–1·s–1] = [m] [kg·m–1] [m·s–2]
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Which statement defines the density of a substance?
the force per unit area acting on the substance
the increase in length per unit length of the substance
the mass per unit volume of the substance
the work done per unit time by the substance
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Hooke’s Law states that the extension of a material is proportional to the load, up to:
the yield point
the limit of proportionality
the breaking point
the elastic limit
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
A load of 3.0 N is attached to two springs of negligible mass joined in series. Each spring has a spring constant of 15 N·m-1. What is the energy stored in the springs?
0.30 J
0.60 J
0.90 J
1.2 J
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Two vertical copper wires X and Y of equal length are joined as shown. Y has a greater diameter than X. A weight W is hung from the lower end of Y. Which of the following is correct?
The strain in X is the same as that in Y.
The stress in Y is greater than that in X.
The tension in Y is the same as that in X.
The elastic energy stored in X is less than that stored in Y.
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
A load of 4.0 N is suspended from a parallel two-spring system as shown in the diagram. The spring constant of each spring is 20 N/m. The elastic energy stored in the system is...
0.10 J
0.20 J
0.40 J
0.80 J
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