Mechanics|Biophysics 1A – Sefako Makgatho Health Sciences University (SMU)
Multiple Choices and Questions and Answers:
Choose the correct answer. Only write down the corresponding letter, e.g. 1. A
1. In which one of the following situations will there be an increase in kinetic energy
A. A projectile approaches its maximum height.
B. A ball starts from rest and freely rolls downhill.
C. A box is pulled across a rough floor at constant speed.
D. A satellite travels in a circular orbit around the earth at fixed altitude.
E. A stone at the end of a string is whirled in a horizontal circle at constant speed.
2. Complete the following statement: A collision is elastic if
A. the final velocities are zero.
B. the objects stick together.
C. the final kinetic energy is zero.
D. the final momentum is zero.
E. the total kinetic energy is conserved.
3. A rigid body rotates about a fixed axis with a constant angular acceleration. Which one of the
following statements is true concerning the tangential acceleration of any point on the body?
A. The tangential acceleration is zero m/s2.
B. The tangential acceleration depends on the angular velocity.
C. The tangential acceleration is equal to the centripetal acceleration.
D. The tangential acceleration is constant in both magnitude and direction.
E. The tangential acceleration depends on the change in the angular velocity.
4. Complete the following statement: A body is in translational equilibrium
A. only if it is at rest.
B. only if it is moving with constant velocity.
C. only if it is moving with constant acceleration.
D. If it is either at rest or moving with constant velocity.
E. if it is moving with either constant velocity or constant acceleration.
5. Which one of the following statements concerning the moment of inertia is false?
A. Inertia may be expressed in units of kg·m2.
B. Inertia depends on the angular acceleration of the object as it rotates.
C. Inertia depends on the location of the rotation axis relative to the particles that
make up the object.
D. Inertia depends on the orientation of the rotation axis relative to the particles
that make up the object.
E. Of the particles that make up an object, the particle with the smallest mass may
contribute the greatest amount to Inertia
6. Complete the following statement: an inertial reference frame is one in which
A. Newtons first law of motion is valid.
B. The inertias of objects within the frame are zero.
C. The frame is accelerating.
D. The acceleration due to the gravity is greater than zero m/s2
E. Newton’s second law of motion is not valid.
7. Which one of the following statements concerning momentum is true?
A. Momentum is a force
B. Momentum is a scalar quantity
Multiple Choices and Questions and Answers:
Choose the correct answer. Only write down the corresponding letter, e.g. 1. A
1. In which one of the following situations will there be an increase in kinetic energy
A. A projectile approaches its maximum height.
B. A ball starts from rest and freely rolls downhill.
C. A box is pulled across a rough floor at constant speed.
D. A satellite travels in a circular orbit around the earth at fixed altitude.
E. A stone at the end of a string is whirled in a horizontal circle at constant speed.
2. Complete the following statement: A collision is elastic if
A. the final velocities are zero.
B. the objects stick together.
C. the final kinetic energy is zero.
D. the final momentum is zero.
E. the total kinetic energy is conserved.
3. A rigid body rotates about a fixed axis with a constant angular acceleration. Which one of the
following statements is true concerning the tangential acceleration of any point on the body?
A. The tangential acceleration is zero m/s2.
B. The tangential acceleration depends on the angular velocity.
C. The tangential acceleration is equal to the centripetal acceleration.
D. The tangential acceleration is constant in both magnitude and direction.
E. The tangential acceleration depends on the change in the angular velocity.
4. Complete the following statement: A body is in translational equilibrium
A. only if it is at rest.
B. only if it is moving with constant velocity.
C. only if it is moving with constant acceleration.
D. If it is either at rest or moving with constant velocity.
E. if it is moving with either constant velocity or constant acceleration.
5. Which one of the following statements concerning the moment of inertia is false?
A. Inertia may be expressed in units of kg·m2.
B. Inertia depends on the angular acceleration of the object as it rotates.
C. Inertia depends on the location of the rotation axis relative to the particles that
make up the object.
D. Inertia depends on the orientation of the rotation axis relative to the particles
that make up the object.
E. Of the particles that make up an object, the particle with the smallest mass may
contribute the greatest amount to Inertia
6. Complete the following statement: an inertial reference frame is one in which
A. Newtons first law of motion is valid.
B. The inertias of objects within the frame are zero.
C. The frame is accelerating.
D. The acceleration due to the gravity is greater than zero m/s2
E. Newton’s second law of motion is not valid.
7. Which one of the following statements concerning momentum is true?
A. Momentum is a force
B. Momentum is a scalar quantity
