Mechanics: Forces, Motion & Energy

In what year did Newton publish his three laws of motion?

• 1687
• 1704
• 1750
• 1642

What is the unit of force?

• watt
• pascal
• newton
• joule

The force of gravity acting on a mass is called ____.

• inertia
• tension
• weight
• friction

Which equation gives an object's weight?

• Ek = ½mv²
• W = mg
• F = ma
• p = mv

The tendency to resist changes in motion is called ____.

• inertia
• momentum
• velocity
• friction

Newton's third law says forces come in equal and opposite pairs.

• True
• False

Approximate value of g near Earth's surface?

• 3.00 m/s²
• 1.0 m/s²
• 9.81 m/s²
• 6.67 m/s²

Displacement is a scalar quantity with no direction.

• True
• False

Velocity is the rate of change of ____.

• displacement
• momentum
• velocity
• force

Which is a valid SUVAT equation?

• p = mv
• F = ma
• v = u + at
• W = mg

SUVAT equations apply only when acceleration is uniform.

• True
• False

Momentum equals mass multiplied by ____.

• acceleration
• height
• force
• velocity

What unit measures momentum?

• kg m/s
• joules
• watts
• newtons

In an inelastic collision, kinetic energy is conserved.

• True
• False

Which equation gives kinetic energy?

• W = Fs
• Ek = ½mv²
• p = mv
• Ep = mgh