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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. = 0.5mv 2 Therefore Matt has Kinetic energy:K.E. (Matt) = 0.5*(60) (5) 2 = 750JAnd Rob has Kinetic energy:K.E. (Rob) = 0.5 (30)*(5) 2 = 375JTherefore Matt has the...
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Answered by Lewis B. • Physics tutor
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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 Distance = spe...
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Answered by Emma C. • Maths tutor
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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 una chaqueta' : '...
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Answered by Laura O. • Spanish tutor
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Draw the graph for y = x^2 + 4x +2

This is a quadratic equation. So we know the shape will look something like this: (draw 'smiley face' shape. Plot some points showing for x=2, y = 4. For x =3, y =9. Show symmetry: a negative number squared ...
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Answered by Laura O. • Maths tutor
6377 Views

Define the Specific Heat Capacity of a material. What is its unit?

This is the amount of energy needed to heat 1kg of the material by 1 degree: ENERGY to heat a MASS by a TEMPERATURE INCREASE. Usingstandard units:Energyis in Joules [J]Massis in kilograms [kg]Temperaturein d...
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Answered by Laura O. • Physics tutor
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