Quiz about Collisions and Momentum

Question 1

What happens to the total energy in a system when 2 objects collide?

Accepted Answer

It remains the same.

Answer

It doubles in amount.

Answer

It halves.

Answer

It disappears.

Question 2

Why is understanding collisions crucial for designing safer cars?

Accepted Answer

To improve safety features based on how collisions affect objects

Answer

To make cars faster

Answer

To reduce the cost of cars

Answer

To make cars more energy-efficient

Question 3

How does the law of conservation of energy apply to collisions?

Accepted Answer

Energy in a collision is neither created nor destroyed, but it can change forms.

Answer

Energy is completely destroyed in a collision.

Answer

New energy is created during a collision.

Answer

Energy stops moving after a collision.

Question 4

In a collision, what is the difference between energy transfer and energy transformation?

Accepted Answer

Energy transfer involves movement between objects, while transformation involves a change in energy type within the same object.

Answer

They are the same process.

Answer

Transfer can only happen in space, transformation only on Earth.

Answer

Energy transfer happens when objects collide; transformation happens when they stop.

Question 5

What evidence from investigations supports the concept of energy conservation in collisions?

Accepted Answer

The total energy before and after the collision is the same, although it may be in different forms.

Answer

Cars always stop immediately after colliding.

Question 6

What role does kinetic energy play in collisions?

Accepted Answer

It may be transferred from one object to another or transformed into other energy forms.

Answer

It disappears upon impact.

Answer

It is the only form of energy that exists in collisions.

Answer

It is not involved in collisions.

Question 7

What is an elastic collision in sports?

Accepted Answer

When the total kinetic energy before and after the collision is the same

Answer

When the objects stick together after collision

Answer

When all kinetic energy is lost

Answer

When the collision causes a permanent change in shape

Question 8

How might the principle of energy transformation be used to design safer car bumpers?

Accepted Answer

By designing bumpers that can absorb kinetic energy and transform it into another form, reducing the force of impact.

Answer

By making bumpers rigid to prevent any form of energy transformation.

Answer

By using materials that increase kinetic energy during a collision.

Answer

By eliminating all forms of energy in the vicinity of the bumper.

Question 9

Based on the law of conservation of momentum, what is true about the momentum of 2 cars before and after they collide?

Accepted Answer

The total momentum of the cars remains the same before and after the collision.

Answer

The total momentum of the cars increases after the collision.

Answer

The total momentum of the cars decreases after the collision due to energy loss.

Answer

Only the car with less mass retains its momentum after the collision.

Question 10

In an investigation of collisions with cars of different masses, what might influence the distance Car B moves after being hit by Car A?

Accepted Answer

The mass of Car A and the velocity at which it collides with Car B

Answer

The color of the cars

Answer

The initial position of Car A only

Answer

The time of day the experiment is performed

Question 11

What illustrates the concept of energy transfer in a real-world scenario?

Accepted Answer

A soccer player kicking a stationary ball, making it move

Answer

A ball remaining stationary on flat ground

Answer

A battery losing charge while not connected to a device

Answer

Ice melting in a glass without external heat

Question 12

What is the significance of inelastic collisions in sports?

Accepted Answer

Part of the kinetic energy is changed into another form of energy, like potential energy

Answer

They demonstrate the total conservation of kinetic energy

Answer

They show that kinetic energy can be completely lost during the collision

Answer

They are used to stop the game quickly in case of an emergency

Question 13

In the scenario of a girl pulling a wagon uphill, what type of energy does the wagon gain?

Accepted Answer

Potential energy, due to its elevation increasing

Answer

Kinetic energy because it is in constant motion

Answer

Thermal energy, from the heat generated by friction

Answer

Chemical energy, from the food the girl ate earlier

Question 14

Why might the government propose a law to reduce the speed limit for larger vehicles like SUVs and trucks?

Accepted Answer

To minimize the impact force and momentum during accidents, enhancing road safety

Answer

Because larger vehicles use more fuel, increasing environmental pollution

Answer

To discriminate against drivers of larger vehicles

Answer

Because larger vehicles are louder, contributing to noise pollution

Question 15

How do energy transfer and energy transformation differ in the context of collisions?

Accepted Answer

Energy transfer is the movement of energy from one object to another, whereas transformation is the change of energy from one form to another within an object.

Answer

Energy transfer involves energy disappearing from the system, while transformation does not.

Answer

Energy transformation can only happen in a vacuum, while transfer needs a medium.

Answer

Both processes describe energy leaving the system entirely.

Question 16

In a collision experiment involving cars of different masses, what role does momentum play in determining the aftermath of the collision?

Accepted Answer

Momentum, product of mass and velocity, affects the force applied during the collision and the resulting motion of the cars.

Answer

Momentum is only preserved in collisions between cars of identical mass.

Answer

Momentum determines the total energy destroyed in the collision.

Answer

Momentum has no effect; only mass and speed are relevant.

Question 17

What does the conservation of momentum imply about the total momentum before and after a collision?

Accepted Answer

The total momentum of the system before the collision equals the total momentum after the collision.

Answer

Momentum after the collision is always greater than momentum before the collision.

Answer

Only the object with greater mass retains its momentum after the collision.

Answer

Total momentum decreases after a collision due to energy loss.

Question 18

Consider the proposed lower speed limits for SUVs and trucks based on momentum concepts. Evaluate the effectiveness of this measure in reducing the severity of collisions.

Accepted Answer

Potentially effective, as vehicles with greater mass (like SUVs and trucks) have more momentum at the same speed, making collisions more severe

Answer

Ineffective, because momentum is not a significant factor in the severity of vehicle collisions

Answer

Completely ineffective, since only the mass of vehicles, not their speed, influences the outcome of collisions

Answer

Counterproductive, as it would increase momentum discrepancies between vehicle types, leading to more severe collisions

Question 19

Considering the concepts of energy transfer and momentum, evaluate why vehicles with larger mass involved in collisions pose greater risks.

Accepted Answer

Because their greater mass at a given speed results in more momentum, making collisions more impactful and causing more damage

Answer

Because they take up more space on the road, leading to more frequent collisions

Answer

Because they are harder to maneuver and thus more likely to cause accidents

Answer

Because they are typically faster than lighter vehicles, leading to more severe impacts

Question 20

When 2 carts of equal mass collide head-on with equal but opposite velocities and come to a complete stop, what is conserved?

Accepted Answer

Momentum

Answer

Velocity

Question 21

In a scenario where 2 carts of the same mass collide and stick together, if one cart was initially at rest, what can be said about the direction of the post-collision velocity?

Accepted Answer

It will be in the direction of the moving cart.

Answer

It will be in the direction of the stationary cart.

Answer

It will be in a direction perpendicular to both carts.

Answer

It will not move.

Collisions and Momentum

Create a free account and access millions of resources

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Science