Grade 9 Forces & equilibrium worksheet in three levels
The same 20-question worksheet on forces & equilibrium in Support, Core and Challenge versions. Question by question, each version keeps the topic and changes the difficulty.
Easier questions on the same topics, for students who need more practice with the basics.
Questions
20 (20 medium)
Grade range
Grades 6 to 11
Topics
Forces & equilibrium
Sample questions
A 20 kg cart has horizontal forces 92 N right and 114 N left. No other horizontal forces act. Taking right as positive, find its acceleration. Round to 3 decimal places if needed. Answer in m/s².
An object moves at constant velocity in an inertial frame. What is its net force?
A mass of 92 kg is in a model gravitational field of 3.7 N/kg. Find its weight. Round to 3 decimal places if needed. Answer in N.
Core
Questions at the expected level for the grade.
Questions
20 (20 medium)
Grade range
Grades 6 to 11
Topics
Forces & equilibrium
Sample questions
On a weightless balanced beam, 34 N acts 4 m left of the pivot. What downward force at 2 m right balances it? Forces are perpendicular to the beam. Round to 3 decimal places if needed. Answer in N.
An object moves at constant velocity in an inertial frame. What is its net force?
On a weightless balanced beam, 20 N acts 7 m left of the pivot. What downward force at 10 m right balances it? Forces are perpendicular to the beam. Round to 3 decimal places if needed. Answer in N.
Challenge
Harder questions on the same topics, for students who are ready to stretch.
Questions
20 (20 challenge)
Grade range
Grades 9 to 12
Topics
Forces & equilibrium
Sample questions
An ideal spring obeys F = kx with k = 770 N/m. A force of 3 N is applied within its linear range. Find its extension. Round to 3 decimal places if needed. Answer in m.
A large truck and a small car collide head-on. How do the forces they exert on each other compare?
An ideal spring obeys F = kx with k = 550 N/m. A force of 7 N is applied within its linear range. Find its extension. Round to 3 decimal places if needed. Answer in m.
Using the three versions
Start everyone with the same short explanation, then hand out Support, Core or Challenge.
Question numbers line up across the versions, so you can go through the answers with the whole class.
The PDF has a cover page and each version on its own pages; the answer keys PDF has all three keys.