Work

A cyclist moves along a level track at steady speed. The work done by the cyclist is equal to

May/June 2015

A 300 N force acts on a box to move it up a ramp, as shown. How much work is done by this force as the box moves from X to Y?

May/June 2016

A force of $300\,\text{N}$ is used to push a box up a ramp, as illustrated. How much work is done by the force as the box is moved from X to Y?

May/June 2016

The work done by a force on a body is found by multiplying the force by a quantity. Which quantity?

May/June 2017

A student whose mass is $60\,\text{kg}$ ascends a set of steps. The student moves $2.0\,\text{m}$ horizontally and rises $1.5\,\text{m}$ vertically. Take the gravitational field strength $g$ to be $10\,\text{N kg}^{-1}$. What is the work done against the force of gravity?

May/June 2017

A force of $400\,\text{N}$ pulls a crate with weight $500\,\text{N}$ up a ramp at constant speed, as illustrated. Some of the work done raises the crate’s gravitational potential energy $E$, while the remainder is work done $W$ against friction. What are the values of $E$ and $W$?

May/June 2018

A woman is doing work while lifting a flag by pulling the rope downwards. This is illustrated in Fig. 4.1.

May/June 2018

The diagram depicts a small car with mass $500\,\text{kg}$ travelling towards a hill. It goes up the hill at a constant speed. The gravitational field strength $g$ is $10\,\text{N kg}^{-1}$. If friction is ignored, how much work is done in taking the car up the hill?

May/June 2019

The diagram depicts a small car with mass $500\,\text{kg}$ travelling towards a hill. It climbs the hill at constant speed. The gravitational field strength $g$ is $10\,\text{N kg}^{-1}$. If friction is ignored, how much work is done in raising the car up the hill?

May/June 2019

The work done on a body by a force $F$ is found by multiplying $F$ by a quantity $q$. What is $q$?

May/June 2021

A force $F$ does work on a body, and the work is found by multiplying $F$ by a quantity $q$. What does $q$ represent?

May/June 2021

A stone is falling through air at terminal velocity. What does the change in the stone’s gravitational potential energy equal?

May/June 2022

A large stone is pushed onto a lorry by means of a ramp. The ramp has length $l$. The stone is raised through a height of $h$. The stone has mass $m$. Its weight is $W$. Which expression is equal to the useful work done on the stone?

May/June 2023

A worker pulls a rope with a force $P$ over a distance $d$ in the same direction as the force, as illustrated. As a result, a block of weight $W$ rises vertically by a height $h$. What amount of work is done by the worker?

May/June 2023

A student with a mass of $60\,\text{kg}$ climbs a flight of steps. He moves $2.0\,\text{m}$ horizontally and rises $1.5\,\text{m}$ vertically. What is the work done against the force of gravity?

May/June 2024

An object being pulled across level ground speeds up towards the right. The diagram indicates the directions of the forces acting on the object. Which force is multiplied by the distance travelled to calculate the work done in increasing the kinetic energy store?

May/June 2025

Which row states the definition of work done and the unit used for work done?

May/June 2025

A lorry with mass $4.4 \times 10^{4}\,\text{kg}$ is moving along a straight, horizontal road at $20\,\text{m s}^{-1}$.

Oct/Nov 2015

A workman moves a barrel, whose weight is $2000\,\text{N}$, up a plank that is $2.0\,\text{m}$ long and into a lorry. The back of the lorry stands $0.80\,\text{m}$ above the horizontal road surface. What work is done on the barrel against gravity?

Oct/Nov 2016

A workman pushes a barrel with weight $2000\,\text{N}$ along a plank that is $2.0\,\text{m}$ long and up into a lorry. The rear of the lorry is $0.80\,\text{m}$ above the level road surface. What is the work done on the barrel against gravity?

Oct/Nov 2016

A heavy box with weight $W$ slides down a frictionless slope. What work is done by the weight $W$ as it moves from the top to the bottom?

Oct/Nov 2019

A worker pushes a barrel with weight $2000\,\text{N}$ up a plank that is $2.0\,\text{m}$ long and into a lorry. The rear of the lorry is $0.80\,\text{m}$ above the flat road surface. What amount of work is done on the barrel against gravity?

Oct/Nov 2020

A pupil applies an average force of $F$ to move a box through a distance of $d$ along a horizontal table. The box has mass $m$ and the gravitational field strength is $g$. How is the work done by the pupil in pushing the box calculated?

Oct/Nov 2020

A labourer pushes a barrel, with a weight of $2000\ \text{N}$, up a plank that is $2.0\ \text{m}$ long and onto a lorry. The lorry’s rear platform is $0.80\ \text{m}$ above the road’s horizontal surface. What is the work done on the barrel against gravity?

Oct/Nov 2020

The diagram depicts a block of mass $m$ being drawn in a straight line across a horizontal surface by a force $F$. Over a time $t$, the block travels a distance $d$. Its average speed is $v$. Which two quantities are needed to work out the work done?

Oct/Nov 2021

An ice-skater of mass $60\,\text{kg}$, moving at first at $3.0\,\text{m s}^{-1}$, slides over a level icy surface. The skater applies the brakes and stops after covering $5.0\,\text{m}$. The work done against the braking force equals the change in the skater’s kinetic energy. What is the braking force?

Oct/Nov 2021

A constant force $F$ drags a block of weight $W$ up the slope shown. What amount of work is carried out by $F$ in moving the block up the slope?

Oct/Nov 2022

A constant force $F$ is used to pull a block of weight $W$ up the slope illustrated. What amount of work is done by $F$ as the block is pulled up the slope?

Oct/Nov 2022

A box of mass $4.0\,\text{kg}$ starts from rest and is pulled across a horizontal floor by a constant force $F$. A constant frictional force of $1.0\,\text{N}$ acts opposite the motion on the box. Once the box has moved $1.0\,\text{m}$, its velocity is $1.5\,\text{m s}^{-1}$. The box's kinetic energy is equal to the work done on it. Determine force $F$?

Oct/Nov 2023

A lorry (truck) is stationary on a straight, level road. A steady driving force of $5.4 \times 10^4\,\text{N}$ acts on the lorry, causing it to accelerate forwards.

Oct/Nov 2023

A rocket is sent straight upward by a constant force from its engines. The launch details are given below: - weight of rocket: $1.9\,\text{MN}$ - average air resistance: $0.10\,\text{MN}$ - force from engine: $3.5\,\text{MN}$ What proportion of the work done on the rocket is converted into an increase in speed over the first $100\,\text{m}$?

Oct/Nov 2024