Unit 8.1 - Contact Forces & Motion
Quiz by Jessica Harris
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- Q1
If you have a bowling ball (7kg) traveling at 5 m/s and a bowling ball (8 kg) traveling at 3 m/s, which one has the most kinetic energy?
The 8 kg ball has more kinetic energy because it travels slower than the other ball.
The 7 kg ball has more kinetic energy because it is smaller.
The 8 kg ball has more kinetic energy because it is bigger.
The ball with less mass, 7 kg, has more energy because it travels fast enough to give it more energy than the 8 kg ball.
45s - Q2
A skydiver whose mass is 100 kg and a skydiver whose mass is 80 kg jump out of a plane at 10,000 feet above the Earth's surface. Which skydiver would have more potential energy.
They both have the same potential energy because the height of the jump is the same.
The skydiver whose mass is 100 kg has the most potential energy because he has more mass than the other skydiver, and the force of gravity and height are the same
The skydiver with less mass has the most potential energy because he would travel faster.
45s - Q3
Which of these is the correct formula for Kinetic Energy
1/2 x mass x speed
1/2 x mass x speed2
1/2x mass2 x speed
mass2 x speed
30s - Q4
Potential energy is known as
energy of an object's density
energy of an object's position or shape
energy of an object's power
energy of an object's motion
30s - Q5
A shopping cart with a 20 kg mass has a kinetic energy of 90 J. Assuming the speed of the shopping cart remains the same, what will be its new kinetic energy if the mass is doubled to 40 kg.
360 J
180 J
270 J
45 J
60s - Q6
When an object is in motion,
the position of another object remains the same
its position remains the same
its position changes relative to another object
the position of another object changes
30s - Q7
An object with increasing acceleration is also increasing in which other property?
Temperature
Velocity
Mass
30s - Q8
Ezra's mother said she was "moving at a snail's pace." How could Ezra determine the average speed of a snail?
She could add together the times it takes the snail to cover several set distances.
She could divide a set distance by the time the snail takes to move that distance.
She could multiply the snail's mass by the time it takes it to cover a set distance.
She can subtract the snail's density from the time it takes to cover a set distance.
45s - Q9
Megan left her wagon outside while it was raining and it filled with water. When Megan tried to move the wagon that afternoon, she failed to budge the wagon. Why did Megan's wagon become hard to move?
The rainwater increased the mass of the wagon, increasing the amount of force it needed to move.
The rainwater decreased the force of friction pulling on the wagon, decreasing the force it needed to move
The rainwater increased the force of gravity pushing on the wagon, increasing the force it needed to move
45s - Q10
Which of the following are a result of friction-related interactions
The object's motion slows down.Transfer of energy in the form of heatdeformationEnergy transfers30s - Q11
What does a straight line on a graph of distance v. time show?
The speed is not constant so the object accelerated.
The speed is constant.30s - Q12
What does a curved line on a distance v. time graph show?
The speed changed so the object accelerated.The speed was constant.
30s - Q13
The energy of motion is...
Kinetic energyPotential energy
30s - Q14
Which type of collision is represented in picture?
C- both objects are moving
A- object is moving and hitting a stationary objectB- A stationary object collides with a moving object
30s - Q15
Energy transfer causes a change in shape
falsetrueTrue or False30s
