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Matt weighs 60kg and his son, Rob weighs 30kg. They both run a 100m race and finish the race running at 5m/s. Who has more Kinetic Energy at the end of the race?

Kinetic energy is given by the equation:K.E. = 0.5mv²Therefore Matt has Kinetic energy:K.E. (Matt) = 0.5*(60)(5)² = 750JAnd Rob has Kinetic energy:K.E. (Rob) = 0.5(30)*(5)

Answered by Lewis B. • Physics tutor

1912 Views

A boat travels due North at 5km/h for 3 hours, then changes course and sails due east for 2 hours, adjusting his speed to 8km/h. What is his total displacement from his original position?

Begin by setting up the problem with a diagram. Yu should draw a right angled triangle, with currently unknown lengths.2) Calculate the distance travelled for the two parts of the journey. Use Dista...

Answered by Emma C. • Maths tutor

2770 Views

How do I evaluate [X]?

The psychology A-level specifications expect students to critically evaluate the experimental design and validity of the studies that they have been looking at throughout the year. This question has a sim...

Answered by Suzan Asya Y. • Psychology tutor

1965 Views

On 3/12/18, Prime Minister Theresa May described the 2016 EU Referendum as "(T)he biggest democratic exercise in our history.” Use your own knowledge to evaluate this comment, and to consider the relationship btwn democracy and referenda in the UK.

- First need to consider conceptual factors – does a referendum weaken aspects of representative democracy by increasing the risk of what de Tocqueville described as a ‘tyranny of the majority’. D...

Answered by Samantha M. • Politics tutor

1809 Views

Listening: 'Ayer, fui de compras. Me gustó una chaqueta, pero no tuvo el dinero suficiente para comprarla. Al fin, compré una falda.' Qué compró la mujer?

What items of clothing does she discuss? (repeat phrase as necessary, slower if the student struggles).
Una chaqueta - a jacketUna falda - a skirt
What did she say about each one?
'Me gustó...

Answered by Laura O. • Spanish tutor

1780 Views