Contents

- 1 How much energy is needed to lift a weight?
- 2 How can you apply the work-energy theorem to lifting a bowling ball?
- 3 Can a baseball’s kinetic energy ever be negative?
- 4 How do I calculate kinetic energy?
- 5 How much energy does it take to lift 1kg 1m?
- 6 How many watts does it take to lift a kg?
- 7 What is the speed of the block when it hits the ground?
- 8 How do you calculate work done?
- 9 Which has more kinetic energy a 4.0 kg bowling ball moving at 1.0 m/s or a 1.0 kg bocce ball moving at 4.0 m/s explain your answer?
- 10 What factors affect kinetic energy?
- 11 What is the gain in GPE when a brick of 2.00 kg is lifted up by 11.5 m?
- 12 What factors affect potential energy?
- 13 How much kinetic energy does a bullet have?
- 14 How do you calculate total energy?
- 15 What is the difference between potential and kinetic energy?

## How much energy is needed to lift a weight?

Lifting Weights: On earth it takes about 10 Newton-meters (N-m) of energy to raise a 1 kilogram mass to a height of 1 meter. Since 1 N-m equals 1 Joule, that’s 10 Joules. 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.

## How can you apply the work-energy theorem to lifting a bowling ball?

Work – Energy Theorem How can you apply the work – energy theorem to lifting a bowling ball from a storage rack to your shoulder? The bowling ball has zero kinetic energy when it is resting on the rack or when it is held near your shoulder. Therefore, the total work done on the ball by you and by gravity must equal zero.

## Can a baseball’s kinetic energy ever be negative?

Can the kinetic energy of a baseball ever be negative? No, because the kinetic energy depends on the square of the velocity which is always positive. Energy is never lost; It is simply transferred into other forms- conservation of energy.

## How do I calculate kinetic energy?

In classical mechanics, kinetic energy ( KE ) is equal to half of an object’s mass (1/2*m) multiplied by the velocity squared. For example, if a an object with a mass of 10 kg (m = 10 kg) is moving at a velocity of 5 meters per second (v = 5 m/s), the kinetic energy is equal to 125 Joules, or (1/2 * 10 kg) * 5 m/s^{2}.

## How much energy does it take to lift 1kg 1m?

On earth it takes about 10 Newton-meters (N-m) of energy to raise a 1 kilogram mass to a height of 1 meter. Since 1 N-m equals 1 Joule, that’s 10 Joules. 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.

## How many watts does it take to lift a kg?

In testing skilled, elite weightlifters Garhammer discovered that the power output in terms of the benchpress for a male during a one repetition, max load lift is four watts per kilogram of bodyweight. As it applies to the deadlift and squat, the number increases to 12 watts per kilogram of bodyweight.

## What is the speed of the block when it hits the ground?

Correct answer: 5. 50894 m/s.

## How do you calculate work done?

Work can be calculated with the equation: Work = Force × Distance. The SI unit for work is the joule (J), or Newton • meter (N • m). One joule equals the amount of work that is done when 1 N of force moves an object over a distance of 1 m.

## Which has more kinetic energy a 4.0 kg bowling ball moving at 1.0 m/s or a 1.0 kg bocce ball moving at 4.0 m/s explain your answer?

The elastic potential energy does not change. Which has more kinetic energy, a 4.0 kg bowling ball moving at 1.0 m / s or a 1.0 kg bocce ball moving at 4.0 m / s? Explain your answer. The bocce ball because it is going faster.

## What factors affect kinetic energy?

The two main factors that affect kinetic energy are mass and speed.

## What is the gain in GPE when a brick of 2.00 kg is lifted up by 11.5 m?

So, the gain in gravitational potential energy is 225.4 J.

## What factors affect potential energy?

The factors that affect an object’s gravitational potential energy are its height relative to some reference point, its mass, and the strength of the gravitational field it is in.

## How much kinetic energy does a bullet have?

With this, I can calculate the kinetic energy of one bullet. That’s almost 2000 Joules. If you move a textbook from the floor to a table, that takes about 10 Joules of energy.

## How do you calculate total energy?

I know that Total energy = potential energy + kinetic energy. Therefore, Total energy = mgh+12mv2.

## What is the difference between potential and kinetic energy?

Potential energy is the stored energy in any object or system by virtue of its position or arrangement of parts. However, it isn’t affected by the environment outside of the object or system, such as air or height. On the other hand, kinetic energy is the energy of an object or a system’s particles in motion.