Contents

- 1 How do you find the kinetic energy of a moving vehicle?
- 2 What is the kinetic energy of a car with a mass of 1000 kg and traveling at 15 m s?
- 3 What is the kinetic energy of a car that moves at 20 m/s if it has a mass of 1200 kg?
- 4 What is the kinetic energy of a car that has a mass of 1000 kg and is moving at a speed of 30 m s?
- 5 What is the formula in kinetic energy?
- 6 How do you find kinetic energy with only mass and height?
- 7 What two factors influence kinetic energy*?
- 8 How do you know when something has more kinetic energy?
- 9 What is the kinetic energy of a 1200 kg object moving at 24 m s?
- 10 Can you calculate energy without mass?
- 11 How fast must a 1000 kg car be moving to have a kinetic energy of?
- 12 What is the kinetic energy of a 5 kg bowling ball rolling at a velocity of 10 m s?

## How do you find the kinetic energy of a moving vehicle?

These ideas are combined in the equation for kinetic energy.

- In words: Kinetic energy equals the mass of the moving object times the square of that object’s speed (v
^{2}). - In equation form: kinetic energy (joules) = 1/2 x mass (kg) x velocity
^{2}(m/s) - In symbols: KE = 1/2 x m x v
^{2}

## What is the kinetic energy of a car with a mass of 1000 kg and traveling at 15 m s?

Kinetic Energy, EK=(1/2)mv^{2}. Energy is conserved, so the work done by the brakes, W, must be equal to the change in kinetic energy of the car, ∆EK. Therefore: W = ∆EK = (1/2)1000(15^{2}-5^{2}) = 0.51000200 = 100000 = 1*10^{5}J.

## What is the kinetic energy of a car that moves at 20 m/s if it has a mass of 1200 kg?

Momentum = mass X velocity =1200X20=24000kgm/s Kinetic energy =0.5XmassX speed 2=0.5×1200X400= 240,000kgm/s.

## What is the kinetic energy of a car that has a mass of 1000 kg and is moving at a speed of 30 m s?

Units: Joules (J) Page 16 Example #2: What is the Kinetic Energy of a 1,000 kg car moving at 30 m/s? KE = 450,000 J Page 17 Example #3: What is the Kinetic Energy of a 20,000 kg freight car moving at 25 m/s?

## What is the formula in kinetic energy?

Kinetic energy is directly proportional to the mass of the object and to the square of its velocity: K.E. = 1/2 m v^{2}. If the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

## How do you find kinetic energy with only mass and height?

= mgh, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 m / s2 at the surface of the earth) and h is the height in meters. Notice that gravitational potential energy has the same units as kinetic energy, kg m2 / s2.

## What two factors influence kinetic energy*?

Explain that there are two factors that affect how much kinetic energy a moving object will have: mass and speed.

## How do you know when something has more kinetic energy?

The faster an object moves, the more kinetic energy it has. The more mass an object has, the more kinetic energy it has.

## What is the kinetic energy of a 1200 kg object moving at 24 m s?

KINETIC ENERGY= 345600Joules.

## Can you calculate energy without mass?

In contrast, for a particle with no mass (m = 0), the general equation reduces down to E = pc. If a particle has no mass (m = 0) and is at rest (p = 0), then the total energy is zero (E = 0).

## How fast must a 1000 kg car be moving to have a kinetic energy of?

The car must move at 2 m/s to have a Ke of 2,000 Joules.

## What is the kinetic energy of a 5 kg bowling ball rolling at a velocity of 10 m s?

Answer: K = 250 J.