Physics 200 - Mechanics Questions

The acceleration due to gravity on Earth’s surface is approximately:

• 9.8 m/s²

• 9.8 km/s²

• 98 m/s²

• 0.98 m/s²

An object is thrown vertically upward with an initial speed of 20 m/s. How high does it go? (g = 9.8 m/s²)

• 20.4 m

• 20.4 m

• 40.8 m

• 10.2 m

The work done by a constant force F in displacing an object over a distance d at an angle θ to the force is:

• Fd cos θ

• Fd sin θ

• Fd

• F/d

Two objects of masses 2 kg and 3 kg are dropped from the same height. Which hits the ground first?

• 2 kg

• 3 kg

• Both hit simultaneously

• Cannot determine without air resistance

The principle of conservation of energy states that in an isolated system:

• Energy can be created

• Energy can be destroyed

• Total energy remains constant

• Kinetic energy always increases

An object moving in a circle at constant speed has:

• Zero acceleration

• Centripetal acceleration

• Tangential acceleration only

• No acceleration

The impulse experienced by an object is equal to:

• Change in momentum

• Force × time

• Force / time

• Work done

Which of the following is a vector quantity?

• Speed

• Distance

• Velocity

• Kinetic energy

The period of a simple pendulum depends on:

• Mass of the bob

• Length of the string

• Amplitude of oscillation

• Gravity and mass only

The kinetic energy of a moving object is proportional to:

• Its velocity

• The square of its velocity

• Its mass only

• Its momentum