Example Problem

Draw

draw and label the forces (not components) that act on the crate.

Open Ended

Calculate the coefficient of kinetic friction between the block and the floor.

You will need to find components of forces and write equilibrium conditions to solve for mu.

Open Ended

Is the normal force on the block greater than, less than, or equal to the weight of the crate?  Justify your answer.

Open Ended

Now the speed is doubled, to 8.0 m/s.  

1) Will the new coefficient of friction be greater than, less than, or equal to the coefficient calculated in (b)?  Justify your answer.

2) Will the new force of friction on the crate be greater than, less than, or equal to the previous force of friction on the crate?  Justify your answer.

Draw

Question 1c(i) Last Year's Exam

On a dot that represents the block, draw and label the forces (not components) that are

exerted on the block at the instant the block slides through Point C .

Each force must be represented by a

distinct arrow starting on, and pointing away from, the dot.

​Grade yourself

​Find this and all FRQs back to 2015 and Scoring Guidelines here:
https://apcentral.collegeboard.org/courses/ap-physics-1/exam/past-exam-questions?course=ap-physics-1-algebra-based

Word Cloud

Don't be shy

What is the most confusing thing in this unit on equilibrium?