Starter quiz

  • Which of the following will increase the pressure produced by a knife being used to cut a rope?
    • increasing the force used  ✓
    • decreasing the force used
    • sharpening the knife to decrease the area of contact  ✓
    • making the knife blunt to increase the area of contact
  • A raft of weight 400 N floats on the surface of water. What is the size of the upthrust acting on the raft?
    • '400 N' ✓
  • Which of these is the correct equation to calculate pressure?
    • pressure = {force \times area}
    • pressure = {force \over area}  ✓
    • pressure = {force + area}
    • pressure = {force - area}
  • A box with a weight of 30 N touches the floor over an area of 0.5 m^2. What pressure does the box produce on the floor?
    • 29.5 N/m^2
    • 30 N/m^2
    • 30.5/m^2
    • 60 N/m^2  ✓
    • 120 N/m^2
  • A pupil pushes downwards with their hand which has a surface area of 60 cm^2. The pressure they produce is 1.2 N/cm^2. What sized force are they pushing down with?
    • 50 N
    • 60 N
    • 61.2 N
    • 72 N  ✓
  • Which of the following produces a pressure of one pascal (1 Pa)?
    • a force of 1 N acting over an area of 1 cm^2
    • a force of 1000 N acting over an area of 1 m^2
    • a force of 1 N acting over an area of 1 m^2  ✓
    • a force of 10 000 N acting over an area of 10 000 cm^2
    • a force of 1 N acting over an area of 10 000 cm^2  ✓
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