Contents

- 1 How much work is done by the engine to increase the speed of the car?
- 2 How do you calculate work done against friction?
- 3 What is the minimum energy needed to change?
- 4 How much work would be required to have a 1100 kg car?
- 5 What is the work to be done to increase the velocity of a car from 30 km per hour to 60 Kilometre per hour?
- 6 What is the work that must be done to increase the velocity?
- 7 Can friction ever do positive work?
- 8 How does friction affect speed?
- 9 What is work done formula?
- 10 What Cannot be created nor destroyed?
- 11 What is the minimum amount of energy?
- 12 What do you call the minimum amount of energy required for a reaction to proceed?
- 13 How much power does a 1000 kg car produced?
- 14 How much work does it take to stop a 1000 kg car traveling at 50 m s?
- 15 How far does the car skid before coming to rest?

## How much work is done by the engine to increase the speed of the car?

According to the Work-Energy theorem or the relation between Kinetic energy and Work done – the work done on an object is the change in its kinetic energy. Hence, the work to be done to increase the velocity of a car from 30km/h to 60km/h is 156250 joule, if the mass of the car is 1500 kg.

## How do you calculate work done against friction?

The work done by friction is the force of friction times the distance traveled times the cosine of the angle between the friction force and displacement; hence, this gives us a way of finding the distance traveled after the person stops pushing.

## What is the minimum energy needed to change?

activation energy: The minimum energy required for a reaction to occur.

## How much work would be required to have a 1100 kg car?

The work that must be done to stop an 1100 kg car travelling at 95 km/h is – 382.74 kJ.

## What is the work to be done to increase the velocity of a car from 30 km per hour to 60 Kilometre per hour?

Example 11.4 What is the work to be done to increase the velocity of a car from 30 km h–1 to 60 km h–1 if the mass of the car is 1500 kg? × 1500 kg × (25/3 m s–1)2 = 156250/3 J. The final kinetic energy of the car, Ekf = 1 2 × 1500 kg × (50/3 m s–1)2 = 625000/3 J.

## What is the work that must be done to increase the velocity?

Work done = Change in kinetic energy.

## Can friction ever do positive work?

The work done by friction can be negative. For example, when a block is sliding over a rough ground, the frictional force acts in a direction opposite to the direction of motion of the block and tries to bring it to a stop. Therefore, friction can do positive, negative as well as zero work.

## How does friction affect speed?

How does Friction affect speed? Friction tends to make an object move along with its neighbors. For example, if a big wind is blowing, friction between it and a leaf on the ground will get the leaf moving, speeding it up. But if a leaf is falling on a still day, friction with the air will slow it down.

## What is work done formula?

Mathematically, the concept of work done W equals the force f times the distance (d), that is W = f. d and if the force is exerted at an angle θ to the displacement, then work done is calculated as W = f.

## What Cannot be created nor destroyed?

The first law of thermodynamics, also known as Law of Conservation of Energy, states that energy can neither be created nor destroyed; energy can only be transferred or changed from one form to another. In other words, energy cannot be created or destroyed.

## What is the minimum amount of energy?

The minimum amount of energy required to initiate a chemical reaction is Activation Energy.

## What do you call the minimum amount of energy required for a reaction to proceed?

Activation energy is the minimum energy required to cause a process (such as a chemical reaction) to occur.

## How much power does a 1000 kg car produced?

Answer and Explanation: The average power provided by the car’s engine is about 31,250 W. Let’s list the information we will need to solve this problem.

## How much work does it take to stop a 1000 kg car traveling at 50 m s?

Work must be done to balance kinetic energy of the moving car. Hence, 385864 J work must be done to stop a traveling car.

## How far does the car skid before coming to rest?

That is a car traveling 10 mi/hr may require 4 feet to skid to an abrupt halt; but a car going twice as fast – 20 mi/hr – would require four times the distance – 16 feet to skid to a stop. A doubling of the speed results in a quadrupling of the stopping distance.