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3U Dynamics Test Review Flashcards | StudBud
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3U Dynamics Test Review
3U Dynamics Test Review
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Physics 11, Forces, Newton's Laws, sph3u, dynamics #forces #newtonslaws #physics11 #dynamics
Flashcards
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Questions
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Answers
1
This astronaut moving at a constant speed through space best describes...
Newton's 4th Law
Newton's 3rd Law
Newton's 2nd Law
Newton's 1st Law
2
When Bob punches Fred in the face...
Force on Bob's hand = Force on Fred's face
Force on Bob's hand < Force on Fred's face
Force on Bob's hand > Force on Fred's face
Force on Bob's hand = - Force on Fred's face
3
A 90 N object at Earth's surface will weigh___at 3 x the distance from the centre of the Earth?
10 kg
30 N
10 N
30 kg
4
Which of the following is the official Star Wars
day
?
14 February
4 May
25 December
1 April
5
An elevator with mass 1000kg accelerates up at 2.0 m/s
2
. What is its weight?
9800N
19600N
2000N
1000kg
6
The gravitational field strength at 2x Earth's radius from the surface is...
1/9 (9.8 N/kg)
1/3 (9.8 N/kg)
1/2 (9.8 N/kg)
1/4 (9.8 N/kg)
7
As a rocket launches successfully, which of the following is NOT NECESSARILY true?
Fnet>Fg
FA>Ff
FA>Fnet
FA>Fg
8
An elevator with mass 1000kg accelerates up at 2.0 m/s
2
. What is the net force acting on it?
19600N
1000N
9800N
2000N
9
F
net
= F
A
always if …
FA is the only force acting
Fg = 0 N
FA = 0N
Ff = 0 N
10
A 23 N force [Right] is used to pull a box against a 3.0 N friction force. The box will…
move right but slow down
suddenly vanish into thin air
move to the right at a constant velocity
speed up to the right
11
The weight of this box is...
10 kg
10 lbs
98 N
10 N
12
The larger sphere doesn't accelerate faster despite having more force of gravity acting on it..
because of air friction
because it has more inertia
because gravity isn't strong enough to make a difference
False - it does accelerate faster
13
Which is
NOT
true of the
COEFFICIENT OF FRICTION
? It is...
unitless
measured in Newtons
greater for rougher surfaces
directionless
14
A ball is thrown straight up. At the top of its path, the net force acting on it is
less than zero
between zero and mg
greater than mg
equal to mg
15
Which is true of an elevator rising at 3.0 m/s?
Fnet<0N
Fnet> 0N
Fnet= 0N
The forces are not balanced
16
The force applied to the bullet equals the force acting back on the gun describes...
Newton's 3rd Law
Newton's 2nd Law
Newton's 1st Law
Newton's 4th Law
17
Which scientist (1600s) developed a framework for the laws of motion and universal gravitation?
Bill Nye
Albert Einstein
Isaac Newton
Galileo Galilei
18
A 23 N force [Right] is used to pull a 10 kg box against a 3.0 N friction force. Acceleration =
2.3 m/s [Right]
10 m/s [Right]
2.0 m/s [Right]
20 m/s [Right]
19
In the following system of masses:
T1<T2<T3
T1<T2>T3
T1>T2>T3
T1=T2=T3
20
Which of the following is NOT one of the 4 fundamental forces in the universe?
Weak Nuclear
Gravity
Electromagnetic
Friction
21
The acceleration of an object is proportional to
the net force acting on it
velocity of object
displacement
its position
