Question

An astronaut weighs 850 N on the Earth’s surface. When the astronaut lands on Planet X, she weighs 190 N. To the nearest tenth of a m/s2, what is the acceleration of gravity on Planet X? (hint: first find her mass!)

An elevator car loaded with two passengers has a mass of 1200 kg. What tension must be applied by the elevator cable to give the car an acceleration of 1 m/s2 upward? Round your answer to the nearest newton.

An 800 kg cannon sits at rest, loaded with a 5 kg cannonball. When the cannon is fired horizontally, the exploding gunpowder accelerates the cannonball at an average acceleration of 4800 m/s2 through the barrel, with the cannonball finally flying out of the barrel at a speed of 120 m/s toward the East. To the nearest newton, the net force that acts on the cannon while firing has a magnitude of ____________N and points toward the__________________

Answer 1

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