You push a box up a ramp. Call the initial time when you begin to push the box.

Question

You push a box up a ramp. Call the initial time when you begin to push the box. Call the final time after you have pushed the box up the ramp a distance of 0.5 m and it is moving with a speed of 2 m/s Two cars are driving down the road. They notice that they are going to crash, so both drivers slam on the brakes. The cars skid, but still collide. The cars stick together and eventually slide to a stop. Call the initial time just before the drivers apply the brakes and the final time just after the collision had occurred.

Explanation / Answer

if its just matter of looking into energy of system, we can say in all of the cases above discussed, ENERGY IS NOT GOING TO BE CONSTANT.

simple argument is, in both the above cases, frictional losses are there, so it will not let energy to be constant.here by saying energy we mean total mechanical energy.

but if we include all forms of energy, then in last option of first problem

box+ramp+earth+you =energy may be constant

argument maybe that heat lost in form of frictional loss is in earth's environment.

Related Questions

Navigate

• Browse (All)
• Browse Y
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.