Newton's 2nd Law of Motion

3.2 Newton's 2nd Law

Some text here about the topic of discussion

Multiple Choice

What is the SI Unit of Force?

• Gram

• Meter

• Newton

• m/s

Multiple Select

What causes an object to accelerate? Pick 2.

• A change in speed

• A change in temperature

• A change in direction

• A change in distance

Multiple Choice

What is the net force on a car with a mass of 1000kg, if it accelerates at 35 m/s²?

$$f\ =\ m\times a$$  

• 1000x35 = 35,000 N

• 1000/35 =

  28.6 N

Multiple Choice

A car is being towed. What is the car's mass if the net force on the car is 4,000 N and it has an acceleration of 2.5 m/s²?

$$f=m\times a$$  

• $$4000\ N\ =\ m\times2.5$$  

  $$4000\div2.5\ =\ 1,600\ kg$$

• $$4,000\ N\ =\ m\times2.5$$  

  $$4,000\ \times2.5\ =\ 10,000\ kg$$

Multiple Choice

The mass of a helicopter is 4,500 kg and the net force on it is 18,000 N. At what rate is the helicopter accelerating?

$$f\ =\ m\times a$$  

• $$4,500\ =\ 18,000\ \times\ a$$

  $$4,500\div18,000\ =\ 0.25\ m/s^2$$  

• $$18,000\ =\ 4,500\ \times\ a$$

  $$18,000\div4,500=4\ m/s^2$$  

Multiple Choice

The type of friction that occurs when 2 objects ARE sliding past one another.

• Static Friction

• Sliding Friction

• Rolling Friction

Multiple Choice

The type of friction that occurs when 2 objects are PREVENTED from sliding past one another.

• Static Friction

• Sliding Friction

• Rolling Friction

Multiple Choice

If a bowling ball and a feather were dropped at the same time on the moon (no air resistance, which one would hit the moon's surface first?

• The bowling ball

• The feather

• They would hit at the same time

Multiple Choice

If a bowling ball and a feather were dropped at the same time on earth, would they hit the ground at the same time?

• NO

• YES

Multiple Choice

What is terminal velocity?

• 0 m/s

• The fastest speed a falling object will reach

• The initial velocity of a falling object