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Answer the following
questions.
(Use lower case only.) |
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1) |
Complete this statement of Newton's First Law
of Motion |
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 forces
on an object mean no change in |
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2) |
What is speed in a certain direction - or
rate of displacement - called? |
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3) |
What is the name for the overall force acting
on an object, taking all other forces into account? |
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force |
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4) |
Stirling's rusted old racing car is resting
at the bottom of the pond he drove it into one day. Taking into account all
the forces acting on it, what is its velocity? |
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5) |
Newton's Second Law of Motion says that a
non-zero resultant force means acceleration. Fill in the missing words from
the paragraph below. |
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If there is an unbalanced , then
an object will
or
in that direction. This change in motion can take five different forms:
speeding up or ,
or stopping, and changing . On
a force diagram the arrows will be . |
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6) |
In the equation F=ma. |
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a) |
What does the F stand for? |
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b) |
What does the m stand for? |
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c) |
What does the a stand for? |
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7) |
What are the units of F, m and a
in words? |
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F= m=
a=
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8) |
Rearrange the equation F=ma as:? |
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a= m=
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9) |
What is the force acting on these
objects? |
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a) |
mass 10kg, acceleration 5m/s2
= N |
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b) |
mass 50kg, acceleration 2.5m/s2
= N |
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c) |
mass 300kg, acceleration 8m/s2
= N |
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10) |
What is the acceleration in m/s2
of these objects? |
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a) |
resultant force 100N, mass 10kg =
m/s2 |
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b) |
resultant force 500N, mass 25kg =
m/s2 |
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c) |
resultant force 75N, mass 2.5kg =
m/s2 |
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d) |
One of the objects above is
falling towards the Earth, is it a, b or c? |
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11) |
When Jack is sitting on his new sledge, the
total mass is 50kg. Starting from rest at the top of the golf club hill, he
experiences a force of 100N down the hill, and a constant resistance of 10N
in the opposite direction. He sets off with a tiny push and travels for ten
seconds before the hill levels off. What is his velocity when he reaches the
bottom? |
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12) |
Complete this statement of
Newton's Third Law of Motion. |
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If object A exerts a force on Object B, then
Object B exerts the exact force
on object A. |
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13) |
Pick the correct statement form
a, b or c that explains Newton's Third Law. |
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a) |
When you push on a wall with
force F, the wall pushes back with a greater force, G. |
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b) |
When you push on a wall with
force F, the wall pushes back with a lesser force, L. |
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a) |
When you push on a wall with
force F, the wall pushes back with an equal force, F. |
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14) |
For the Queen's birthday a cannon is fired,
sending a cannonball flying out, accelerating at 5m/s2. The
cannonball has a mass of 90kg. |
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a) |
What was the force, in newtons,
that propelled the cannonball? N |
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b) |
What force is exerted on the
cannon? N |
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c) |
If the cannon has a mass of
450kg, how fast will it accelerate? m/s2 |
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d) |
In which direction, compared to
the cannonball? |
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15) |
Complete the following statement from
apopular science fiction film series, to create a truly appalling Laws of
Motion pun. |
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May the be
with you. |
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