Basic science: forces and motion

What you’ll learn and practice

Forces and motion can feel simple until you mix in friction, changing speed, or tricky graphs. This quiz helps you connect core ideas—like net force and acceleration—to real situations.

Each question is multiple choice with 4 options and no timer, so you can think through units, directions, and cause-and-effect without rushing.

Difficulty and question settings

Difficulty is mixed by design: you’ll see straightforward definitions alongside multi-step reasoning (like interpreting motion graphs or comparing forces). Choose your question count and difficulty before you start to tailor the session for quick revision or deeper practice.

Common pitfalls to avoid

Many wrong answers come from sign/direction mistakes or mixing up mass and weight. Another frequent slip is assuming “moving” means “a force is required,” instead of focusing on net force.

• Confusing speed with velocity (magnitude vs direction)
• Treating mass and weight as the same quantity
• Forgetting that balanced forces mean zero acceleration, not zero motion
• Misreading distance–time vs velocity–time graphs
• Ignoring friction/air resistance when a scenario implies it
• Dropping units or mixing N, kg, and m/s² in calculations