11Easy
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An underwater research rover (ROV) is being winched upwards towards a recovery ship. As it nears the surface, it decelerates.

  • The ROV decelerates at 0.4 m/s2.
  • The combined mass of the ROV and its payload is 350 kg.
a.

Calculate the time taken for the vertical velocity of the ROV to decrease from 3.5 m/s to 1.1 m/s. Use the equation:

time taken=change in velocitydeceleration \text{time taken} = \frac{\text{change in velocity}}{\text{deceleration}} time taken=decelerationchange in velocity​
[2]
b.

Calculate the magnitude of the resultant vertical force acting on the ROV to cause this deceleration. Use the equation:

resultant force=mass×deceleration \text{resultant force} = \text{mass} \times \text{deceleration} resultant force=mass×deceleration
[2]

Forces and motion Questions

Practise AQA GCSE Physics Forces and motion with exam-style questions for Foundation and Higher tier. 83 questions covering Describing motion along a line, Forces, accelerations and Newton's Laws of motion, and Forces and braking, matched to the AQA GCSE Physics (8463) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.

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Forces and motion Questions

  1. GCSE
  2. /Physics
  3. /Forces and motion