Question

A toolbox is placed in the back of a pickup truck. Starting from rest, the truck drives off with a constant acceleration. By the time that the truck has moved forward 20 m, the toolbox has slid 1 m toward the rear of the truck. Which, if any, of the following statements is/are true?

Answer 1

The acceleration of the toolbox is less than the acceleration of the truck.

If the frictional force between the toolbox and the truck were zero, then the toolbox would not move.

Both the toolbox and the truck accelerated.

The coefficient of static friction, &mus between the toolbox and the truck is less than the coefficient of kinetic friction, &muk between the toolbox and the truck

The frictional force of the truck on the toolbox is greater than the frictional force of the toolbox on the truck.

Answer 2

If the truck moved 20m the toolbox moved 19m in the same time starting from rest
so.....

Answer 3

I put true false true false false...but maybe I did something wrong?

Answer 4

I'm unsure about teh last one

Answer 5

these frictional forces form an action reaction pair

Answer 6

so...

Answer 7

so the second one is true then? since no force woudl be acting on the box?

Answer 8

all ur answers(earlier ones) were correct
it is the frictional force that opposes relative motion and prevents the toolbox from sliding back in the truck

Answer 9

The online program im using is telling me I was wrong

Answer 10

what program and which part is wrong?

Answer 11

I don't know what is wrong- its loncapa

Answer 12

oh im srry the second is true if seen(rightly so) from an inertial frame (road)

Answer 13

yeah. It's a crappy question since they didnt tell me relative to ____

Answer 14

is the ans correct now?

Answer 15

yep :) thanks a bunch

Answer 16

np