
PHYSICS SEMINAR
Quiz
•
English
•
6th Grade - Professional Development
•
Practice Problem
•
Medium
MELVIN LEE
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5 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Figure 2 shows the graph of velocity, v against time, t, for the movement of a piece of rock thrown vertically upwards.
What was the height reached by the stone when its velocity was 15 ms-1?
10.00 m
11.25 m
33.75 m
41.25 m
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Figure 3 shows a car of mass 2000 kg that broke down and has to be towed by a lorry in a straight line at an acceleration of 1 ms-2 .
If the frictional force acting on the car is 50 N , what is the tension in the rope, T ?
1 950 N
2 000 N
2 050 N
2 500 N
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Two satellites X and Y of the Earth have masses m and 2m and orbits radii r and 2r respectively as shown in the diagram.
The speeds of the satellite are VX and VY. which of the following correctly states VX and VY?
Vx = √2 Vy
B Vx = Vy/√2
Vx = 2Vy
D Vx = 4Vy
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
The escape velocity from the surface of the Earth is v. What is the escape velocity from a height h = 2R, where R is the radius of the Earth?
v/√3
v/√2
√2 v
√3 v
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Figure shows an arrangement of four resistors. When the points P and Q are connected to a circuit, the effective resistance is R1.
When the points X and Y are connected to a circuit, the effective resistance is R2.
What is the ratio of R1:R2?
1:1
1:2
3:4
8:9
9:8
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