Experiment 3 — Force, Mass and Acceleration

Topic: Physics · Class 9 · Newton’s laws of motion: F = ma and inertia

Aim: Accelerate the trolley at exactly 2 m/s² .

Daily: A loaded truck takes far longer to pick up speed than an empty one from the same engine, and a seatbelt exists entirely because of the first law: your body keeps moving when the car suddenly does not.

Question: The same force is applied to a 2 kg and an 8 kg trolley. The 8 kg trolley accelerates…

Exp: a = F ÷ m, so four times the mass gives a quarter of the acceleration.

Exp: Friction and other forces must be subtracted first.

Question: Inertia is measured by an object’s…

Exp: More mass means more resistance to a change in motion.

Question: A 6 N net force on a 3 kg body gives…

Question: A cricketer moves his hands back while catching to…

Exp: Force = change in momentum ÷ time.