Daily Practice

GCSE Science

17th March 1988

5 questions · GCSE · 584 questions in this band

1
Radioactivity, Half-Life and Nuclear Uses
A GM tube detects a count rate of 240 counts per minute from a source. After 15 days the count rate has fallen to 30 counts per minute. Show that this data is consistent with a half-life of 5 days.
2
Forces
A gardener pushes a mower with a force of 60 N through a distance of 8.0 m. Calculate the work done. Use W = F x s.
3
Motion: Speed, Velocity and Acceleration
State what the gradient of a distance-time graph represents.
4
Forces, Newton's Laws and Momentum
Explain why a larger vehicle mass increases braking distance.
5
Pressure, Moments and Levers
Explain why a rucksack with wide, padded straps is more comfortable to carry than one with thin straps, for the same load.

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