Question

Question below ::::::::::

Answer 1

A body of mass 6 kg is under a force of 6 N which causes displacement in it given by \[S=\frac{t^2}{4}m\].The work done by the force in 2 s is-

Answer 2

@amistre64 @ParthKohli @ajprincess @aroub @UnkleRhaukus @experimentX @ganeshie8 @gerryliyana @CliffSedge @mahmit2012

Answer 3

Work = force × distance.

Plug in your t=2s to solve for s, then multiply.

Answer 4

w=6*s

Answer 5

@phi have a look

Answer 6

\[S=\frac{2^2}{4}=1\]

Answer 7

right @ajprincess and @phi

Answer 8

yup perfect:)

Answer 9

yes. s is 1 meter
force is 6 N
work is 6 N-m

Answer 10

sure @phi

Answer 11

of course N-m is a joule
so
6 joules

Answer 12

but in google docs answer is other.
https://docs.google.com/viewer?a=v&q=cache:iGC7itlY6hsJ:www.sakshieducation.com/(S(mlzd0s2wqyatcnayoccra055))/EAMCET%255CPB%255CPhysics%255CJr%2520Inter%2520Physics%255C01_04DYNAMICS.pdf+a+body+of+mass+6+kg+is+under+a+force+of+6N+which+causes+displacement+in+it+given+by+S%3Dt%5E2/4.The+work+done+by+the+force+in+2s+is&hl=en&gl=in&pid=bl&srcid=ADGEESgoWoRGthzMJxeS9CK9CeGLWz08eJHYO6rMwA9LPVp2eoDVW6dnxYNlEVi57PtQhxXGRXPuCy-GmKRzWmiYPhYrBcPxe7NRK3f2hJAadBMg3nvNTp9m4dfiUbMILYgDBsbEKgoP&sig=AHIEtbRq9vQXIj94aHgaiG1dn4VdMjL9hQ


question no. 14

Answer 13

@phi

Answer 14

Q14 does not say the force is 6 N.

Answer 15

it says 3J but you say 6J

Answer 16

the question says "6 kg under a force that causes a displacement..."

we need to find F, using F= ma
we need a

use d = 1/2 a t^2
we know d and t so we find a, then F and finally W = F d

Answer 17

@Aperogalics

Answer 18

d (or s) in this case is 1 m
t is 2 sec
1 = 1/2 a 2^2
a= 1/2 m/s^2

F= ma = 6*1/2 = 3 N

W = F d = 3N * 1m = 3 N-m = 3 J

Answer 19

so my question is also same @phi

Answer 20

your question says: mass 6 kg is under a force of 6 N ...

you gave the force as 6 N so that is what I would use....

Answer 21

what do you mean? @phi

Answer 22

Q14 requires that you find the force...

Your 1st question may be inconsistent? i.e. 6 kg and 6 N don't mesh with the displacement?

Answer 23

oh!!

Answer 24

thnx..... @phi