Question

B.find the magnitude and direction of the net force in each situation.

5. A 500 passenger boring 747 jet (with a mass of 1.6 x 105 kg) undergoes an acceleration of 1.2 m/s^2 [S] along a runway.

6. A cannon gives a 5.0 kg shell a forward acceleration of 5.0 x 103 m/s^2 before it leaves the muzzle.

7. A 28 g arrow is given an acceleration of 2.5 x 10^3 m/s^2.

8. the world's fastest coconut tree climber takes only 4.88 seconds to climb barefoot 8.99 meters up a coconut tree. calculate the climber's average velocity for this motion, assuming that the climb was vertically upward.


@johnweldon1993 @ganeshie8 @ParthKohli @aaronq @kawaiicat123

Answer 1

Hello @jansd345 !

Answer 2

hi! @Abhisar

Answer 3

In the first situation, two forces are acting on the jet. One is the thrust force and the other is gravitational force.

Answer 4

Both forces are perpendicular to each other. Net force will be equal to the vector sum of each force.

\(\sf \sqrt{(1.6\times 10^5\times 1.2)^2+(1.6\times 10^5\times 10)^2}\)

Answer 5

I hope you know how to add vectors ?

Answer 6

I'm still not sure with that yet

Answer 7

@Abhisar

Answer 8

Do you have to learn vectors in your syllabus ?
Do you have answer key to these questions ?

Answer 9

as I mentioned, in the syllabus, it's not very descriptive. and right now, I don't see on the lesson about vectors..

No, I don't have an answer key too... That's why I need help

Answer 10

Ok, then i think you have to simply calculate the force in the given situations.

Answer 11

Force = Acceleration \(\times\)Mass nad the direction of force is towards the direction of acceleration.

Answer 12

*and

Answer 13

Can you solve the questions now ?

Answer 14

so the 1.6x105 kg do I times that? 1.6x105?

Answer 15

I'm pretty sure I could, but I need a double check with a professional. physics isn't really my thing, and it gets really confusing..

Answer 16

is it 1.6\(\times\)105 or 1.6\(\times 10^5\) ?

Answer 17

no 105

Answer 18

ok. for first question,

Force = 1.6 X 105 X 1.2

Answer 19

okay

Answer 20

Calculate similarly for rest of the problems.

Answer 21

Don't forget to keep everything in SI units

Answer 22

wait, in these question I am finding the magnitude and direction?

Answer 23

By the above method you are finding the magnitude. Direction will be same as that of acceleration. Like for first question direction of acceleration is given south, so the direction of force will also be south.

Answer 24

Got it ?