H2P-141
Newton’s second law
H2 Physics · JC 1 · Hard · Newton’s second law
A 70 kg student stands in a lift that is moving upwards but slowing down at 1.5 m s⁻². The gravitational field strength is 9.8 m s⁻². What is the magnitude of the normal reaction on the student from the floor?
- 490 N
- 581 N
- 686 N
- 770 N
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