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WorksheetsF2 Cambri - Forces and Energy Review
Total questions: 143
Worksheet time: 2hrs 15mins
What is the use of force meter?
We use force meter to measure mass.
We use force meter to check your blood pressure.
We use force meter to measure weight.
We use a force meter to check your weight.
What is newton's second law?
F = Ma
Ma = fm
X = Fm
Fm = A
What unit is force measured in?
newton
Weight
None
Kg
What is a formula for converting mass to weight
M = 10*w
W = M*10
M = W*10
W = M by 10
What are balanced forces? ...
If two individual forces are acting in opposite directions and are equal in magnitude, then the force is said to be balanced.
If two individual forces are acting in the same directions and are equal in magnitude, then the force is said to be balanced.
If 4 individual forces are acting in opposite directions and are equal in magnitude, then the force is said to be balanced.
If 4 individual forces are acting in same directions and are equal in magnitude, then the force is said to be balanced.
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Calculate the weight of a man who has a mass of 75 kgs.
750N
750
I don't know mate.
500N
What is the definition of a force?
Net force equal 0N and there is no change in the object's motion
the overall force acting on an object after all forces are combined
a push or a pull that acts on an object
The force does not equal 0N, the object accelerates
What is the definition of net force?
a push or a pull that acts on an object
Net force equal 0N and there is no change in the object's motion
the overall force acting on an object after all the forces are combined
The force does not equal 0N, the object accelerates
What do we call a force that has a net force of zero Newtons and the object does not change its motion?
balanced force
unbalanced force
acceleration force
net force
What is the magnitude and direction of the force in the free body diagram shown?
70 N right
70 N left
50 N right
50 N left
What is the magnitude and direction of the force in the free body diagram shown?
2000 N forward
800 N backward
1200 N forward
2800 N forward
What is the magnitude and direction of the force in the free body diagram shown?
35 N right
17 N right
11 N right
5 N right
You are pushing a wheelbarrow. What happens to the wheelbarrow's motion if more mass is added and you push with the same force?
The motion will remain the same
The motion will increase.
The motion will decrease.
The motion will change directions.
What is the weight of a 456g object?
456g
0.456kg
4.56N
456N
The astronaut floats in international space station. It proves that...
His weight is less in space
His mass is less in space
His weight does not change
His mass is more in space
If a force of 26 N is exerted on two balls, one with a mass of 0.52 kg and the other with a mass of 0.78 kg, which ball will have the greater acceleration? (F=ma)
The one with a mass of .78 kg will have the greatest acceleration.
The one with a mass of .52 kg will have the greatest acceleration.
They will both accelerate at the same rate.
A physical science text book has a mass of 2.2 kg. What is the weight on the Earth? g = 10 m/s2
22.00 N
21.56 kg
21.56 m/s
21.56 m/s2
If your mass is 35 kg on Earth, what would you weigh on Mars (g = 3.7 m/s2)? W=mg
120 N
130 N
120 kg
130 kg
What is the resultant force?
17 N, Left
6N, Right
11N , Left
12N, Left
What is potential energy?
moving energy
stored energy
renewable energy
non renewable energy
How does a windmill change forms of energy?
Mechanical to electrical
Electrical to mechanical
Mechanical to light
It is unable to change forms
If you have a battery in a device, what is the first energy transformation that must happen?
Chemical to light
Chemical to electrical
Electrical to chemical
Electrical to light
If the marble had a mass of 0.3kg and the hill was 2.3 m tall, how much potential energy did it have at the top of the ramp?
2.3
.23
6.9
5.2
At which point does the ball has the greatest gravitational potential energy (GPE)?
A
G
D
C
G
How could you increase the gravitational potential energy of an object without changing its mass and gravity?
Make the object larger
Lower the object towards the ground
Raise the object farther off the ground
Allow the object to roll on the ground
Which is the correct unit for expressing gravitational potential energy?
Joule
Newton
m/s2
meter
A cheetah can run briefly with a speed of 31.0 m/s. Suppose a cheetah with a mass of 47.0 kg runs at this speed. What is the cheetah’s kinetic energy?
1457 Joules
22,584 Joules
15 Joules
45,167Joules
What two factors affect an object's kinetic energy?
area and volume
mass and weight
weight and height
mass and speed
Rank in order, from largest to smallest, the gravitational potential energies of the balls.
1 > 2 = 4 > 3
1 > 2 > 3 > 4
3 > 2 = 4 > 1
3 > 2 > 4 > 1
Not knowing technically what density is yet, what does your gut tell you? Which is "more dense", the balloon of air or the bowling ball? What makes you think that?
Which diagram shows the MOST dense object?
left
center
right
Which diagram shows the LEAST dense object?
left
center
right
Rank the objects from MOST dense to LEAST dense.
left, center, right
right, center, left
left, right, center
right, left, center
center, left, right
A block of aluminum occupies a volume of 15.0 mL and weighs 45.0 g. What is its density?
3 g/mL
0.3333 g/mL
675 g/mL
I have no idea
A sample of liquid has a mass of 300 g and occupies 50 mL in a graduated cylinder. What is the density?
15,000 g/mL
.16667 g/mL
6 g/mL
Yup, still no clue
How are you feeling about your ability to apply the density formula to calculate density?
This is pretty easy for me
As long as I have the formula in front of me I think I'll be alright
Numbers and math scare me so I have no confidence even if I'm doing it right
I can't follow what we're doing so I should probably watch the Edpuzzle and Notes and maybe come for extra help
The Law of Conservation of Energy states:
Energy can created or destroyed but not transformed
Energy cannot be created or destroyed, it can only transformed
Energy can't be created, destroyed or transformed
Energy cannot be created or destroyed.
What kind of energy does an object possess when it's resting on top of the hill?
Potential Energy
Chemical Energy
Kinetic Energy
All of the above
What do you need to add to kinetic energy in order to find an object’s mechanical energy?
Initial Energy
Gravitational Energy
Thermal Energy
Potential Energy
What force causes a roller coaster cart to slow down the most?
friction
weight
gravity
air resistance
What is the formula for Kinetic Energy?
KE = mass x velocity
KE= 1/2 x mass x velocity 2
KE = mass x gravity x height
KE = mass x velocity / 2
Which form of energy is represented in this image?
kinetic
thermal
potential
radiant
What happens when the ball goes from the highest position to the lowest position
PE and KE increases and decreases together
Impossible to know without knowing the mass of the object
the PE decreases while KE increases
What kind (s) of energy is (are) in this image?
Potential
Kinetic
Both Potential and Kinetic
The SI Unit for Energy is
Joule
Potential
Calorie
Kilojoule
Efficiency is calculated by Energy Out divided by Energy In, expressed as a percentage
False
True
What percentage of Energy is wasted by a human being converting food into work?
15%
25%
50%
75%
A combustion engine driving car loses most of it energy (75%) to heat. Is this energy loss or energy transformation?
loss
transformation
neither
both
A toy car down a ramp loses most of its energy to
friction
sound
heat
gravity
The energy of a certain point with respect to some reference point is
Spatial Energy
Velocity
Potential Energy
Kinetic energy
According to the Law of Conservation of Energy, what CAN'T Energy do? (select all that apply)
it cannot be created
it cannot be transferred into or out of a system
it cannot be transformed to a different energy
it cannot be destroyed
The amount of energy before and after an event, like a chemical reaction, must be the same. Another way to say this is that _?_.
the total amount of energy is conserved
the total amount of energy decreases
the total amount of energy increases
In a car's internal combustion engine 'system' most of the chemical energy it gets from the fuel is transformed to thermal energy. What happens to the thermal energy?
it raises the temperature of the engine
it leaves the system and enters the surrounding environment
it is transformed to mechanical energy to move the car
all of these
The fusion reaction on the sun transforms _?_ energy to _?_ energy, which is the only form that can travel through outer space.
nuclear, mechanical
chemical, light
nuclear, thermal
nuclear, electromagnetic
What type of energy is provided by the food we eat?
e-m light
thermal
chemical
sound
What is happening with energy when you hold an ice cube in your hand?
cold energy from the ice cube transfers to your hand
thermal energy from your hand transfers to the ice cube
cold energy from your hand transfers to the ice cube
thermal energy from the ice cube transfers to your hand
When a soccer player kicks a ball, _?_ is transferred to the ball.
mechanical energy
sound energy
electromagnetic energy
chemical energy
An isolated/closed system has two marbles of equal mass. Marble A is rolling, and Marble B is at rest. If Marble A hits Marble B, what will happen to the amount energy in the system?
it will be destroyed
it will be split between the two marbles
it will remain the same
it will be increased
What form of energy is stored in the bonds between atoms and compounds.
electromagnetic
nuclear
kinetic
chemical
What form of energy involves the movement of the internal particles of matter?
chemical
potential
thermal
sound
What form of energy holds protons and neutrons close together in the middle of atoms?
nuclear
chemical
mechanical
sound
What form of energy is all about motion?
thermal
nuclear
chemical
mechanical
If a certain amount of energy leaves a system, _?_.
energy has been destroyed
it must create new energy to make up for it
the surrounding environment gains the same amount of energy
a transformation has occurred
As a plant grows it transforms _?_ energy into _?_ energy by way of photosynthesis.
thermal, electromagnetic
chemical, light
nuclear, chemical
electromagnetic, chemical
During combustion, fuels are transformed from _?_ energy into _?_ energy.
thermal into electromagnetic
chemical into electromagnetic & thermal
nuclear into chemical
electromagnetic into thermal
iron bar How has the heat travelled along the iron bar?
Which diagram shows the movement of air as the room is heated?
When the lid is removed, the rate of heat loss from the drink increases. What causes this?
Which line in the table describes the temperature and the direction of the air that moves through the gap?
Which statement is correct?
How does the heat from the fire reach each child’s hands?
What are the main processes by which heat energy is transferred from the element to the water, and throughout the water?
