**Goal:** Problem solving and developing strategic knowledge

**Source:** UMPERG-ctqpe104

You are given this problem:

A

block sits on a frictionless incline. Given the mass of the block, the

angle of incline, the distances d_{1}and d_{2}, and

that the block starts from rest, find the time to travel from

d_{1}to d_{2}.

What principle would you use to solve the problem MOST EFFICIENTLY?

- Kinematics only
- F = ma or Newton’s laws
- Work-Energy theorem
- Impulse-Momentum theorem
- Angular Impulse-Angular Momentum
- 1 & 2
- 1 & 3
- 2 & 3
- None of the above
- Not enough information given

## Commentary:

## Answer

(6) Students responding #1 are relying on memory and would have

difficulty if a force other than gravity was involved.