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How would you calculate the vertical and horizontal components of the velocity of an object with an initial velocity of 15m/s which is travelling upwards at an angle of 30 degrees to the horizontal?

With these sort of questions involving components, I would always advise drawing a diagram of the problem so that you're clear of the situation!In this case we have an object that is travelling at a speed...

Answered by Joseph P. • Physics tutor

5686 Views

If a train leaves for a 130 mile journey at 1.30pm, and travels at a constant speed of 50 miles per hour, at what time will it arrive?

First, calculate the time taken for the train to complete its journey:
Distance = 130, Speed = 50, Time = Distance/Speed = 130/50 = 2.6 hours.
Next, use this to calculate the time of arrival:

Answered by Luke D. • Maths tutor

4510 Views

An excess of Lead (II) oxide reacts with 175cm3 of 1.5 mol dm3 nitric acid. Calculate the maximum quantity of lead that can be obtained from this reaction.

Write the equation: PbO + HNO₃ --> PbNO₃ + H₂O. Balance the equation: there are two moles of hydrogen (in water) on the right. To bala...

Answered by Hibba S. • Chemistry tutor

8299 Views

What are the advantages of making voting compulsory in the UK? (10 Marks)

As evidenced in liberal democracies where compulsory voting is a federal law, this has had a positive impact on political participation and has been proposed by campaigners such as Graham...

Answered by Hugh D. • Government and Politics tutor

4316 Views

Using Newton's law of universal gravitation, show that T^2 is proportional to r^3 (where T is the orbital period of a planet around a star, and r is the distance between them).

Newton's law of gravitation is: F_G=(GMm)/(r²).First of all, it's a good idea to draw a diagram of the planet and star, labelling the directions of the centripetal force and and the p...

Answered by Jake B. • Physics tutor

3415 Views