A Space, time and motion

Practice questions on Space, time and motion

• Explain why a ball thrown horizontally from the top of a cliff and a ball dropped vertical… (4 marks, Explain)
• Explain why the horizontal range of a projectile launched at 30° above the horizontal is t… (4 marks, Explain)
• Explain why a book resting on a table remains stationary, using Newton's laws of motion. I… (4 marks, Explain)
• Explain why two ice skaters, initially at rest, move in opposite directions after pushing … (4 marks, Explain)
• Explain why the total mechanical energy of a skydiver falling through the atmosphere is no… (4 marks, Explain)
• Explain why the efficiency of a machine that converts electrical energy into mechanical en… (4 marks, Explain)
• A ball is thrown vertically upward and rises to a maximum height before falling back down.… (4 marks, Explain)
• Explain why the work done by the normal contact force on a car travelling along a horizont… (4 marks, Explain)
• Explain why a person standing on a bathroom scale in a lift (elevator) that is acceleratin… (4 marks, Explain)
• Explain why a rocket moving through empty space can accelerate even though there is no med… (4 marks, Explain)
• Explain why a passenger in a car experiences a forward lurch when the car brakes suddenly … (4 marks, Explain)
• Explain why an object moving with constant speed along a curved path must be accelerating. (4 marks, Explain)
• Explain why the displacement of an object undergoing uniform acceleration is not directly … (4 marks, Explain)
• A car travelling along a straight road accelerates uniformly from rest. Explain how the ve… (4 marks, Explain)