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Course: AS Physics 9702
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Curriculum

AS Physics 9702

1. Physical quantities and kinematics

0/41 Dr Dabour Hub Science Diagram and Course Material

2. Dynamics, forces and pressure

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3. Work, energy, power and deformation

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4. Waves and superposition

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5. Electricity and D.C. circuits

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6. Particle physics

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7. Circular motion and gravitational fields (A Level)

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8. Thermal physics (A Level)

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9. Oscillations (A Level)

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10. Electric fields and capacitance (A Level)

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11. Magnetic fields and alternating currents (A Level)

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12. Quantum and nuclear physics (A Level)

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13. Medical physics and astronomy (A Level)

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Quiz

12.1.1 Radians and Angular Displacement – Check yourself

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  • Questions count: 24
  • Passing grade: B+
  • Time limit: 10 minutes
Start Quiz
1.
How many radians are in 90°?
π
π/2
2π
π/4
2.
A wheel has radius 0.50 m. A point on its rim turns through 4.0 rad. The arc length is…
0.125 m
8.0 m
4.5 m
2.0 m
3.
2.0 rad is approximately…
57°
115°
90°
360°
4.
The radian is defined as the angle subtended at the centre of a circle by…
an arc equal to the radius
an arc equal to the circumference
an arc of 1 m
a chord of 1 m
5.
A graph of angular displacement θ against time for steady rotation is…
a curve through the origin
a horizontal line
a straight line through the origin
a parabola
6.
A wheel makes 3.5 revolutions. Its angular displacement is…
7π rad
3.5 rad
3.5π rad
44 rad
7.
In uniform circular motion the acceleration is directed…
towards the centre
along the velocity
away from the centre
along the tangent backwards
8.
The centripetal force on a body in a circular path does…
positive work
negative work
no work
work equal to mv2
9.
A whirled stone suddenly released from a string flies off…
radially outwards
towards the centre
downwards only
along the tangent
10.
Which expression is NOT a correct form for centripetal acceleration?
v2/r
ω2r
vω
ωr2
11.
The speed is doubled for the same radius. The centripetal acceleration…
quadruples
doubles
halves
is unchanged
12.
For a satellite in circular orbit, the centripetal force is provided by…
thrust from engines
centrifugal force
gravitational force
air resistance
13.
The angular velocity of a minute hand is
2π/3600 rad s−1 × 2
π/1800 rad s−1
2π/60 rad s−1
π/30 rad s−1
14.
A wheel turns at 30 revolutions per minute. Its angular velocity is
π rad s−1
30 rad s−1
60π rad s−1
0.5 rad s−1
15.
A point 0.50 m from the axis has ω = 4.0 rad s−1. Its speed is
8.0 m s−1
12.6 m s−1
0.125 m s−1
2.0 m s−1
16.
Two points on a rotating disc at different radii have the same
velocity
speed
angular velocity
acceleration
17.
The direction of the velocity of an object in uniform circular motion is
towards the centre
along the tangent
away from the centre
along the radius
18.
An arc of length 3.0 m on a circle of radius 1.5 m subtends an angle of
2.0 rad
4.5 rad
115 rad
0.5 rad
19.
In uniform circular motion the resultant force is directed
along the velocity
away from the centre
towards the centre
opposite to the velocity
20.
A satellite orbits Earth in a circle. The centripetal force is provided by
its engines
gravitational attraction
centrifugal force
air resistance
21.
A ball on a string is released at the top of its horizontal circle. It moves
along the tangent
along a smaller circle
radially outward
radially inward
22.
The work done by the centripetal force in one revolution is
2πrF
positive
negative
zero
23.
At the lowest point of a vertical circle, the tension in a string compared with the weight
is less
is equal
is greater
is zero
24.
A car on a flat road takes a bend. The centripetal force comes from
the engine
friction between tyres and road
the weight
air resistance
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Part of 1. Physical quantities and kinematics — see every lesson and quiz in this unit.
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