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

**Source:** UMPERG-ctqpe101

You are given this problem:

A

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

distance along incline, and the mass of block, find the acceleration

after traveling a distance d.

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-Ang. Momentum
- More than one of the above
- Not enough information given

## Commentary:

## Answer

(2) The 2nd law is needed to find the acceleration. Students who

answer that only kinematics is needed are relying on memory.