Contents

- 1 Which has a greater kinetic energy a car traveling?
- 2 Does the kinetic energy of a car change more when it speeds up from 10 to 15?
- 3 Which has greater kinetic energy a car traveling at 30 km/h or another car of half the mass traveling at 60 km h?
- 4 How much does your kinetic energy change when you double the speed of your car from 30 mi HR on the street to 60 mi hr on the highway?
- 5 Does kinetic energy increase with height?
- 6 What energies are potential?
- 7 Does a car’s kinetic energy change more when the car speeds up from 10 to 15 m/s or from 15 to 20 m s?
- 8 How does a car’s kinetic energy change when it speeds up from 10 to 20 m/s How does a car’s kinetic energy change when it speeds up from 10 to 20 m s?
- 9 Does the KE of a car change more when it goes from 10 to 20?
- 10 Which requires more work lifting a 50 kg sack?
- 11 When you jump from an elevated position?
- 12 How much power is expended if you lift?
- 13 How long will it take a car to go from a complete stop to 44 km HR if they are accelerating at 5 km hr2?
- 14 How far does a car travel in 1 second at 60 km h?
- 15 Can you tell how fast a car was going by the damage?

## Which has a greater kinetic energy a car traveling?

It turns out that an object’s kinetic energy increases as the square of its speed. A car moving 40 mph has four times as much kinetic energy as one moving 20 mph, while at 60 mph a car carries nine times as much kinetic energy as at 20 mph.

## Does the kinetic energy of a car change more when it speeds up from 10 to 15?

Yes, a car’s kinetic energy changes with the speed. Think about it. If a car is going faster, it has more potential to do damage. Cars going slower have less potential energy than cars going faster.

## Which has greater kinetic energy a car traveling at 30 km/h or another car of half the mass traveling at 60 km h?

Which has greater kinetic energy, a car traveling at 30 km/h or a half-as-massive car traveling at 60 km/h? Both have the same kinetic energy.

## How much does your kinetic energy change when you double the speed of your car from 30 mi HR on the street to 60 mi hr on the highway?

This means that when the velocity of an object doubles, its kinetic energy quadruples. A car traveling at 60 mph has four times the kinetic energy of an identical car traveling at 30 mph, and hence the potential for four times more death and destruction in the event of a crash.

## Does kinetic energy increase with height?

As the height increases, there is an increase in the gravitational potential energy P and a decrease in the kinetic energy K. The kinetic energy K is inversely proportional to the height of the object.

## What energies are potential?

Types of potential energy include:

- Gravitational potential energy.
- Chemical energy.
- Nuclear energy.
- Elastic potential energy, also called spring energy.
- Electrical potential energy especially in a capacitor.

## Does a car’s kinetic energy change more when the car speeds up from 10 to 15 m/s or from 15 to 20 m s?

Answer and Explanation: The kinetic energy changes more if the car goes from 15 m/s to 20 m/s.

## How does a car’s kinetic energy change when it speeds up from 10 to 20 m/s How does a car’s kinetic energy change when it speeds up from 10 to 20 m s?

When a car’s speed increases from 10 m/s to 20 m/s, the kinetic energy increases by a factor of four.

## Does the KE of a car change more when it goes from 10 to 20?

Does the KE of a car change more when it goes from 10 to 20 km/h or when it goes from 20 to 30 km/h? j So KE changes more for a given change in velocity at the higher speed. Ex #51.

## Which requires more work lifting a 50 kg sack?

Which requires more work: lifting a 50kg sack a vertical distance of 2m orlifting a 25kg sack a vertical distance of 4m? Answer= It is the same, for the product of each is the same; (50 kg) (2 m) = (25 kg) ( 4 m ).

## When you jump from an elevated position?

When you jump from an elevated position you usually bend your knees upon reaching the ground. By doing this, you make the time of the impact about 10 times as great as for a stiff-legged landing. In this way the average force your body experiences is A) less than 1/10 as great. B)

## How much power is expended if you lift?

If it takes 1 second to lift the weight 1 meter, than you have converted 10 Joules of energy to potential energy in one second. That’s 10 Watts of power. If you lift a 2 kg weight 1 meter in 1 second, then the rate of energy conversion is 2 x 10 = 20 Joules per second, or 20 Watts of power.

## How long will it take a car to go from a complete stop to 44 km HR if they are accelerating at 5 km hr2?

44 = 0 + 5 * t so t = 44 / 5 = 8.8 hours (not seconds – thanks to Harry Sharp).

## How far does a car travel in 1 second at 60 km h?

Also, 1 hour = 60 minutes = 3600 seconds. Therefore, it can also be said that the car travels 60 miles in 3600 seconds. Therefore, it can travel 60/3600 miles in 1 second, which is equal to approximately 0.017 miles.

## Can you tell how fast a car was going by the damage?

The severity of the damage can tell investigators important information. A minor dent may indicate that a driver was traveling at low speed or that the driver had nearly enough time to finish braking. Severe damage can tell investigators how fast a vehicle may have been traveling or how hard the car was hit.