Physics Help Forum Cab Anyone Help Me Get The Answer To This?
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 Jan 15th 2018, 06:06 AM #1 Junior Member   Join Date: Jan 2018 Posts: 1 Cab Anyone Help Me Get The Answer To This? Can you help me calculate this or understand how to do the following two questions in my assignment? 4 A 747 Jumbo Jet must reach a speed of 290km/h by the end of the runway to lift off. The 15L-33R runway at Toronto International Airport is 2,770 meters long. The main Toronto Island Airport runway 08-26 is 1216 meters long. Assuming the jet has a constant acceleration, for each runway: a) [2] The time to reach the end of the runway b) [2] The required acceleration. c) [1] Do you think 747 will ever take off and land on the island? I've tried for hrs to figure this out please someone help
Jan 15th 2018, 06:17 AM   #2
Senior Member

Join Date: Apr 2015
Location: Somerset, England
Posts: 747
 I've tried for hrs to figure this out please someone help
Here is a tip for doing any of these kinematics questions.

1) write down a complete list of variables - just use the symbols (I have defined them this time for your benefit)

u = initial velocity
v = final velocity
s = distance travelled
t = time taken
f = acceleration

2) Place all the information given in the question against your list.

u = 0
v = (290*1000)/3600 metres per second (did you notice this trap?)
s = 2770
t = ?
a = ?

3) Now write down all the kinematics equations you know (you shouldn't have more than five)

I will only write down 1 to start you off

v^2 = u^2 + 2fs

Last edited by studiot; Jan 15th 2018 at 06:19 AM.