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What is the work done on a 5kg mass being lifted 10m vertically?

Work done = Force x Displacement. The force on the 5kg mass will be 5xg (g=acceleration due to gravity). The displacement is 10m. So the work done will be 50xg or around 475j.
RC
Answered by Rio C. • Physics tutor
2860 Views

How can you increase the turning force on a spanner?

Use a longer spanner.The turning force can also be called the "moment".Remember that moment = force x distance (from pivot)Therefore increasing the distance between the pivot and the force on the s...
MO
Answered by Mayowa O. • Physics tutor
12661 Views

A student investigated how the resistance of a piece of nichrome wire varies box with length.Describe how the student would obtain the data needed for the investigation. Your answer should include a risk assessment for one hazard in the investigation.

methodical approach to answering the question step by step:1) The length of the wire needs to be measured and varied (this is order to get a complete set of results for your experiment )2) Then go through ea...
AL
Answered by Alastair L. • Physics tutor
26248 Views

David left his basketball outside overnight. At 1am the volume of air within the ball was 1.2m^3 and the outdoor temperature was 5 degrees Celsius. At 3am the temperature was -7 degrees Celsius. What is the volume of air inside the ball at 3am?

For this question we solve it using Charles’ Law. Charles’ law states that the product of volume and temperature gives a constant value. This is illustrated by VT=C. This means that volume and temperature ar...
SK
Answered by Skye K. • Physics tutor
2215 Views

A jug containing 0.250 kg of liquid is put into a refrigerator. Its temperature decreased from 20°C to 15°C. The amount of energy transferred from the liquid was 5,250 J. Calculate the specific heat capacity of the liquid.

specific heat capacity = change in energy ÷ (mass × change in temperature) [1]= 5,250 ÷ (0.250 × 5) [1]= 4,200 J/kg°C [1]
BP
Answered by Benjamin P. • Physics tutor
1922 Views