Download Starter Questions: Force and Motion

Starter Questions: Force and Motion
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What is force?
What is mass?
What is acceleration?
What units apply to make a Newton?
What is the formula to calculate force?
To which of Newton’s Laws does this
formula apply?
7. Give an example of Newton’s First Law
(The Law of Inertia)
8. What will have more force, a football
player tackling at 10 m/s or a car hitting a
wall at 10 m/s?
Calculate the following problems. Show ALL
your work!!!
1. It takes a force of 3000 N to accelerate an
empty 1000 kg car at 3 meters per second
square. If a160 kg wrestler is inside the car,
how much force will be needed to produce
the same acceleration?
2. A 63 kg skater pushes off from a wall with
a force of 300 N. What is the skater’s
acceleration?
3. A weightlifter raises a 440 kg barbell with
an acceleration of 2 meters per second
square. How much force does the
weightlifter exert on the barbell?
4. A book falls from the balcony of a 12th
floor apartment. It smashes on the ground
2.5 seconds later. How fast is it moving just
before it hits?
Momentum: The Law of Conservation of
Momentum states that the total amount of
momentum of a group of objects does not
change unless outside forces act on the objects.
1. A boater tries to jump a few feet from a
boat to land. Instead, he lands in the
water. Explain why. (Think about newton’s
3rd law)
2. Compare the momentums of a 50 kg
dolphin swimming 16.4 meters per second
and a 6300 kg elephant walking 0.11 meters
per second.