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NECO SSCE Uniform Circular Motion and Gravitation — practice questions

Explore 33 free Uniform Circular Motion and Gravitation questions in NECO SSCE Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Uniform Circular Motion and Gravitation questions and exercises with answers

Showing questions 1–30 of 33.

In rotational motion, the rotation angle plays the same role as which linear quantity?Read the answer and worked solution →What does the arc length measure for an object moving on a circle?Read the answer and worked solution →In which unit is angular velocity expressed?Read the answer and worked solution →Two wheels turn for the same time, but one sweeps a larger angle. What follows?Read the answer and worked solution →A car rounds a bend at a steady speed. Why is it still accelerating?Read the answer and worked solution →Acceleration is defined as a change in velocity of which kind?Read the answer and worked solution →In which direction does centripetal acceleration point?Read the answer and worked solution →What name is given to any net force that causes uniform circular motion?Read the answer and worked solution →How is a centripetal force oriented relative to the object's path?Read the answer and worked solution →In which direction does the centripetal force on a body act?Read the answer and worked solution →A passenger feels thrown sideways as a car turns. How is that feeling described?Read the answer and worked solution →When does an observer's frame of reference become non-inertial?Read the answer and worked solution →On what two things does the gravitational force between two bodies depend?Read the answer and worked solution →How does the gravitational force vary with the distance between two particles?Read the answer and worked solution →How does gravitation rank among the four basic forces of nature?Read the answer and worked solution →Who first gave the gravitational force an exact mathematical form?Read the answer and worked solution →Every particle in the universe attracts every other particle along which line?Read the answer and worked solution →What does it really mean to say an orbiting astronaut is weightless?Read the answer and worked solution →What does the term microgravity describe?Read the answer and worked solution →What happens to an astronaut's muscles during a long stay in microgravity?Read the answer and worked solution →Besides muscle wasting, what else do astronauts lose in microgravity?Read the answer and worked solution →What shape does each planet's orbit about the Sun take, and where does the Sun sit?Read the answer and worked solution →What does the line from the Sun to a planet sweep out in equal times?Read the answer and worked solution →Kepler's third law relates the squares of the periods to which quantity?Read the answer and worked solution →Under what condition does an ellipse become a circle?Read the answer and worked solution →A stone is whirled on a string in a horizontal circle. What supplies the centripetal force?Read the answer and worked solution →Why does a centripetal force change a body's direction but never its speed?Read the answer and worked solution →The Moon stays in orbit around the Earth. Which force provides its centripetal force?Read the answer and worked solution →Real force or fictitious?Read the answer and worked solution →Circles and orbits bingoRead the answer and worked solution →

Worked practice questions

In rotational motion, the rotation angle plays the same role as which linear quantity?

  1. Linear distance
  2. Linear momentum
  3. Linear density
  4. Linear mass
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Correct answer: A. Linear distance

1. The rotation angle records how much an object has turned about its axis. 2. That is the rotational counterpart of how far an object has travelled in a straight line. 3. So the rotation angle is analogous to linear distance. 4. It is defined as the arc length divided by the radius of curvature. _Source: OpenStax College Physics (CC BY 4.0), Ch 6 "Uniform Circular Motion and Gravitation", section Rotation Angle_

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What does the arc length measure for an object moving on a circle?

  1. The radius of the circular path
  2. The distance travelled along the path
  3. The angle turned through in radians
  4. The time taken for one revolution
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Correct answer: B. The distance travelled along the path

1. Arc length is measured along the curved path itself, not across it. 2. It is therefore the distance travelled by the object as it moves round the circle. 3. Dividing that arc length by the radius of curvature gives the rotation angle. 4. For one complete revolution the arc length equals the circumference of the circle. _Source: OpenStax College Physics (CC BY 4.0), Ch 6 "Uniform Circular Motion and Gravitation", section Rotation Angle_

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In which unit is angular velocity expressed?

  1. Metres per second
  2. Newtons per metre
  3. Radians per second
  4. Degrees per metre
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Correct answer: C. Radians per second

1. Angular velocity is defined as a rotation angle divided by the time taken. 2. The angle is measured in radians and the time in seconds. 3. So the unit of angular velocity is radians per second. 4. Metres per second belongs to linear velocity, which is a different quantity. _Source: OpenStax College Physics (CC BY 4.0), Ch 6 "Uniform Circular Motion and Gravitation", section Angular Velocity_

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