Daily Practice · GCSE Science

Daily Practice - GCSE Science

4th November 1995

5 questions · GCSE · 584 questions in this band

1
Radioactivity, Half-Life and Nuclear Uses
Explain why americium-241, an alpha emitter, is suitable for use in a smoke detector.
2
Forces
A resultant force of 45 N acts on an object of mass 9.0 kg. Calculate its acceleration. Use F = m x a.
3
Motion: Speed, Velocity and Acceleration
A runner completes a 400 m race in 52 s. Calculate her average speed, giving your answer to 3 significant figures.
4
Forces, Newton's Laws and Momentum
Explain, using Newton's Third Law, why a swimmer is able to push themselves forward by pushing backward against the water.
5
Pressure, Moments and Levers
A box of weight 120 N has a base area of 0.40 m^2. Calculate the pressure it exerts on the ground.

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