WorksheetsPhysics Equation
Total questions: 10
Worksheet time: 5mins
A car of mass 500kg is accelerating at 6m/s2. What is the driving force produced by the engine?
resultant force (N) = mass (kg) x acceleration (m/s2)
You need to remember the equation
Force = m x a
F = 500kg x 6 = 3000N
4000n
5000N
7500N
A man pushes a car with a force of 200N along a straight horizontal road. He manages to accelerate the car by 0.1m/s². Find the mass of the car.
Use the equation
Force = mass x acceleration
Rearrange the equation to get mass
mass = force ÷ acceleration
1500kg
2000kg
45005g
3560kg
A car accelerates from a velocity of 20m/s to a velocity of 35m/s in 25 seconds. What is the acceleration of the car?
acceleration (m/s2) = change in velocity (m/s) ÷time taken (s)
Change in velocity = 35m/s - 20 m/s = 15
Time = 25 seconds
Acceleration = change in velocity ÷ time taken
= 15 ÷ 25
= 0.6m/s2
Calculate the weight of car of mass 400kg on earth.
Gravitational field strength on Earth is 9.8.
Weight = mass x gravitational field strength
Weight = mass x graviational field strength
Weight = 400kg x 9.8 = 3920 N
5000N
600N
An object of weight 40N is raised by a height of 0.4m. Calculate the work done in raising the object.
Work done (J) = force (N) x distance (m)
Work done has the same unit as energy
Work done (J) = force (N) x distance (m)
work done = 40 x 0.4 = 16 J
work done = 40 / 0.4
2000J of energy is transferred by a sprinter as he runs a distance of 100m. Calculate the force that is exerted by the sprinter as he is running.
work done (j) = force x distance
Rearrange the equation to get force
Force = work done / distnce
Force = 2000J / 100 = 20 Newtons
50N
75N
12N
400J of energy is transferred in raising an object in 1 minute. What is the power?
Power(watts) = work done (j) ÷ time taken (sec)
Power (watts) = energy transferred ÷ time taken (sec)
Power = energy transferred ÷ time taken
Time 1 minute = 60 seconds
Power = 400 ÷ time taken
Power = 400 ÷ 60
Power = 6.66 watts
63 watts
414 watts
Kinetic energy = 0.5 x mass x (speed)2
Joules kg m/s
A go-kart travels along a stratight length of track at 8.5m/s
The go-kart and its driver have a combine mass of 160kg.
Calculate the total energy in the kinetic energy stores of the go-kart and the driver.
Use the above equation
5780J
4000J
300J
200J
Gravitational Potential Energy = mass x gravitational field strenghth x height
A 500g object fall of a cliff and loses 100J from its gravitational potential energy. If the gravitational field strength is 9.8. How high is the cliss?
÷
500g needs to be converted to Kg
500 g is 0.5kg
Gravitational Potential Energy = mass x gravitational field strenghth x height
100J = 0.5kg x 9.8 x height
Height = 100 ÷ (0.5 x 9.8) = 20.4m
A current of 2amps passes through a devise with a resistance of 8Ω . What is the power of the device?
Power = (current)2 x resistance
32W
15
20
25
