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A stationary ball starts rolling down a hill, and after 5s it reaches a speed of 12m/s. From here the ground levels off, and the ball continues at this speed for 3 more seconds. Plot this on a velocity-time diagram.

First we need to draw a velocity-time diagram, which has time on the x-axis, or bottom, and velocity on the y-axis, or left.The ball begins from a stop, so we can draw a dot at (0,0). It accelerates until it...
SM
Answered by Sean M. • Maths tutor
2987 Views

How would you work out how much money each Fred and Julie get if they share £60 in a 5:7 ratio?

If Fred and Julie share £60 in a 5:7 ratio, Fred will get 5/12ths of the money and Julie will get 7/12ths of the money. All together there will be 12 parts of the money because 5 + 7 = 12So, you need to divi...
TS
Answered by Tiegan S. • Maths tutor
5304 Views

When should the imperfect preterite be used as opposed to the perfect preterite when describing things that happened in the past?

The 'perfect tense' is used to describe events in the past that had a definite ending whereas the imperfect tense if used to describe events which were ongoing. i.e. if we wanted to say: 'While Juan was eati...
CS
Answered by Charlotte S. • 13 Plus tutor
1374 Views

Many enzymes present in cells require a catalyst to aid their actions. Describe the role of a catalyst.

A catalyst acts to lower the activation energy of the reaction. It speeds up the reaction without being used up. Binding of the catalyst alters the tertiary structure of the enzyme, causing the active site t...
CB
Answered by Charlotte B. • Biology tutor
2252 Views

Expand and simplify: (2x – 3y)(5x + 2y)

10x^2+4xy-15xy-6y^210x^2-11xy-6y^2
KI
Answered by Khansa I. • Maths tutor
5108 Views