what is the second law of motion

acceleration of an object depends its mass & force.

what is the first law of motion

an object in motion/rest until unbalanced forces upon it.

a tendency to do nothing or to remain unchanged

The change of position or movement.

What is the equation to calculate efficiency?

efficiency = useful energy / total energy

The resultant force of a lever can be increased by ....?

Making the effort arm longer or the load arm shorter

Terminal velocity is...

The fastest an object can travel

What is the Third Law of Motion?

Every action has an equal and opposite reaction

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Questions 45

Answers

1
Which equation can be used to calculate the power of an appliance?
P = IR
P = I2R
P = IR2
V = IR
2
what is the second law of motion
an object's ability to resists a change in motion
motion of any kind
acceleration of an object depends its mass & force.
changing motion in the moon
3
what is the first law of motion
for every action there is an equal an opposite reaction.
actions with internia
an object in motion/rest until unbalanced forces upon it.
the magnitude of the force acting upon it
4
In this equation, what does I represent?
Potential difference in Volts (V)
Current in Amps (A)
Velocity in Metres per second (m/s)
resistance in ohms
5
What equation links power, current and resistance?
power = current2 ÷ resistance
power = current2 x resistance
power = current x resistance
power = current ÷ resistance
6
what is inertia??
a tendency to do nothing or to remain unchanged
a group of particles that combine\ to make force
the same thing as gravity
none of the above
7
What equation links force, mass and acceleration?
force = mass x acceleration
force = mass ÷ acceleration
8
What is the Second Law of Motion?
Every action has an equal and opposite reaction
The Law of Inertia
F=ma
Energy cannot be created or destroyed
9
What equation links charge, current and time?
Q=I/t
charge = current x time
Q=It
Charge = current / time
10
In this equation, what does V represent?
Velocity
Potential difference
Vertical
Speed
11
What does this symbol represent in Physics?
Power
Density
Proportion
Momentum
12
What is motion?
How far an object goes
The location of an object.
The change of position or movement.
A push or pull.
13
What is the equation to calculate efficiency?
efficiency = total energy x useful energ
efficiency = useful energy / total energy
efficiency = useful energy x total energy
efficiency = total energy / useful energy
14
Is this a Lever
Maybe
No
So
Yes
15
What does the following nuclear equation represent?
gamma decay
beta decay
alpha decay
16
Who discovered the Laws of Motion?
Galileo
Barack Obama
Isaac Newton
William Shakespeare
17
What is the Energy of motion
Thermal
Magnetic
Kinetic
Potential
18
What is the equation for kinetic energy?
= force x distance
= 1/2 x mass x velocity2
= work done / time
= mass x gravitational field strength x height
19
An object of mass 20g is projected at 20m/s². Calculate its Force
40 N
400 N
4000 N
4 N
20
What is terminal velocity?
when forces are balanced
when weight = air reistance
all of these
constant velocity
21
What equation links speed, distance and time?
speed = distance x time
speed = distance ÷ time
22
What is the equation for acceleration?
distance/time
time/distance
time/ change in velocity
change in velocity/time
23
Motion and Speed
A
B
D
C
24
is kinetic energy the energy of motion?
False
True
25
The resultant force of a lever can be increased by ....?
Making the load arm and the effort arm shorter.
Making the effort arm longer or the load arm shorter
Making the load arm and the effort arm longer.
Making the load arm longer or the effort arm shorte
26
What is the equation for density?
Density = mass/ area
Density = force /area
Density = mass / volume
Density= volume / mass
27
Motion
B
A
C
D
28
What is the equation for force?
F=a/ma
F=ma
F=m/a
KMFM
29
What is the equation for speed?
speed = distance / time
speed = time / distance
speed = distance x time
speed = time x distance
30
What is the equation for specific heat capacity
E=1/2mv2
E=mgh
E= m x c x ΔƟ
E=1/2 ke2
31
in physics, m = motion of the object
True
False
32
Terminal velocity is...
How fast freshmen walk
The fastest an object can fall
The fastest an object can travel
Impossible
33
What is the first Law of Motion?
The Law of Inertia
F=ma
Every action has an equal and opposite reaction
Energy cannot be created or destroyed
34
How would you describe the motion from 5-12 seconds?
decreasing velocity
constant velocity
increasing velocity
no motion
35
What is the equation for work
Work = mass x acceleration due to gravity
Work = distance x height
work = force x distance
Work = force x acceleration due to gravity
36
What is the equation for pressure?
Pressure = Force / length
Pressure = Force x area
Pressure = Force / area
Pressure = length x bredth
37
What is the Third Law of Motion?
F=ma
The Law of Inertia
Heat cannot be created or destroyed
Every action has an equal and opposite reaction
38
How to calculate motion ?
Speed = Distance x time
Speed=time/distance
Distance=speed/time
Speed=distance/time
39
In this equation, what does V represent?
Speed/velocity
Mass
Ventilation
Energy
40
How would you describe the motion from 0-5 seconds?
increasing velocity
no motion
decreasing velocity
constant velocity
41
What does the following nuclear equation respresent?
Beta emission
Gamma emission
Alpha emission
42
Power Equation 1
Time x Energy
Time / Energy
Energy x Big Tony Brown
Energy / Time
43
How would you describe the motion from 12-14 seconds?
no motion
decreasing velocity
constant velocity
increasing velocity
44
What is the equation for electrical power?
W = P × I2 × R2
E = F × d
P = V × I × t
P = I × V
45
In this equation, what does the Q represent?
Charge
Time
Energy
Current

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