Font size
WorksheetsForces, Motion & Engineering Design (8th Grade)
Total questions: 30
Worksheet time: 17mins
A soccer ball is kicked across the grass and eventually slows down. What force mainly causes it to stop?
Gravity
Friction
Magnetism
Inertia
A book is sliding across a desk but slows down and stops. Which statement BEST explains what happened?
Gravity increased
The desk pushed it forward
Friction opposed the motion
The book lost mass
Which of the following is a non-contact force?
Push
Pull
Friction
Gravity
A student pushes a cart with 15 N of force. Another student pushes in the opposite direction with 15 N. What will happen?
The cart accelerates forward
The cart accelerates backward
The cart does not move
The forces increase its speed
A 4-kg object accelerates at 3 m/s². What is the net force acting on the object?
7 N
12 N
4 N
3 N
Which situation shows balanced forces?
A rocket blasting upward
A car accelerating at a green light
A book resting on a table
A ball rolling down a hill
A magnet pulling a paperclip involves what type of force?
Electrical
Magnetic
Applied
Friction
A car moves at a constant speed on a straight road. Which statement is TRUE?
Net force is zero
Net force is increasing
Friction is stronger than the engine force
Gravity is removed
When a parachute opens, what force increases to slow the skydiver down?
Gravity
Magnetic force
Air resistance
Electrical force
A student pushes a 2-kg box with 10 N of force. The box accelerates at 4 m/s². How much friction is acting?
2 N
4 N
6 N
10 N
A team created a prototype bridge, but it collapsed when tested. Which design step should they return to?
Identify the problem
Test the solution
Improve and redesign
Communicate the plan
Students are asked to build a structure that can hold 20 textbooks. What is this describing?
Materials
Criteria
Constraints
Brainstorming
A team has only 20 minutes and limited materials. What part of the design process are these details?
Criteria
Constraints
Improvements
Prototype
Students draw different possible bridge shapes before choosing one. What step is this?
Test
Plan and brainstorm ideas
Communicate
Research
After testing their bridge, students write a report explaining what happened and what they would fix. Which step is this?
Imagine
Improve
Plan
Identify
A group discovers their bridge holds weight but sways too much. What should they do first?
Start from scratch
Identify the problem with stability
Ignore it and continue
Use cheaper materials
Students want to reduce bending in the center of their model bridge. Which improvement is MOST effective?
Paint the bridge
Add extra supports or trusses
Make the bridge longer
Remove glue
During testing, the teacher announces the load capacity will increase from 3 kg to 5 kg. What changed?
Materials
Problem
Criteria
Constraints
Which scenario shows the testing stage?
Choosing shapes
Measuring how much weight the bridge holds
Listing materials
Talking about solutions
A team must finish their design using only 50 sticks and 30 minutes. What is this?
Testing
Criteria
Constraints
Brainstorming
A team builds 3 prototypes and tests each one. Why is this a good engineering strategy?
More prototypes save time
It allows comparing designs
It guarantees success
It removes constraints
A student drops a weight onto their bridge model to test strength. What force is acting downward?
Magnetism
Gravity
Friction
Air resistance
A bridge needs to support a moving load (like cars). Which force will vary the most?
Gravity
Normal force
Applied force
Magnetic force
After testing, students find cracks in the joints of their bridge. What is the MOST reasonable next step?
Stop the project
Add reinforcements and retest
Add decorations
Change the color
A team records data showing how much weight their bridge held before breaking. What part of the process is this?
Imagine
Research
Communicate results
Plan
Match the following types of friction to their examples.
Static Friction
Rolling Friction
Sliding Friction
(a) is a force that always resists the relative motion of objects or
surfaces.
What is the net force of this example?
0N
200N
100N
N
Force
kg
Mass
m/s2
Acceleration
What is the net force?
3 N
3 N, right
17 N, right
3 N, left
