Daily Practice - GCSE Science
18th August 1994
- 1Atomic Structure and the Development of the Model
What did Bohr add to the nuclear model?
- 2Radioactivity, Half-Life and Nuclear Uses
State the number of protons and the number of neutrons in an alpha particle.
- 3Forces
A box has a driving force of 250 N forward and friction of 180 N backward. Calculate the resultant force, including its direction.
- 4Motion: Speed, Velocity and Acceleration
A ball decelerates uniformly from 18 m/s to 0 m/s over a distance of 2.7 m while being caught. Using (final velocity)^2 = (initial velocity)^2 + 2 x acceleration x distance, calculate its deceleration.
- 5Forces, Newton's Laws and Momentum
A resultant force of 60 N acts on a wheelbarrow of mass 15 kg. Calculate its acceleration.
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