what is the person's weight? 3. A 75-kg woman in an elevator is accelerating upward at a rate of 0.6 m/s. a) What is the net force acting upon the woman? b) What is the gravitational force acting upon the woman? c) What is the normal force pushing upward on the woman's feet?

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Author:Raymond A. Serway, Chris Vuille
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Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
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Question 3 can you show me how to solve This is just a study guide review...not graded
These practice problems, together with homework solutions and problems in the labs, will help you prer
the test.
1. A net force of 60 N accelerates a 4-kg mass over a distance of 15 m.
a) What is the work done by this net force?
b) What is the increase in kinetic energy of the mass? If the mass starts from rest, what is its fina
energy?
2. The mass of the Earth is 5.98 x 1024
kg, and its average radius is 6370 km. Find the gravitational fo
weight) of a 50-kg person standing on Earth's surface by using Newton's law of gravitation. If the pe
stands on another planet whose mass is double of the Earth's mass and radius is 3 times of the Eart
what is the person's weight?
3. A 75-kg woman in an elevator is accelerating upward at a rate of 0.6 m/s.
a) What is the net force acting upon the woman?
b) What is the gravitational force acting upon the woman?
c) What is the normal force pushing upward on the woman's feet?
4. A very large cat sits at the center of a swing. Two scales are attached to the ropes.
One scale reads 5 kg.
A. What does the second scale read?
B. What is the combined weight of the cat and swing?
Skg
Transcribed Image Text:These practice problems, together with homework solutions and problems in the labs, will help you prer the test. 1. A net force of 60 N accelerates a 4-kg mass over a distance of 15 m. a) What is the work done by this net force? b) What is the increase in kinetic energy of the mass? If the mass starts from rest, what is its fina energy? 2. The mass of the Earth is 5.98 x 1024 kg, and its average radius is 6370 km. Find the gravitational fo weight) of a 50-kg person standing on Earth's surface by using Newton's law of gravitation. If the pe stands on another planet whose mass is double of the Earth's mass and radius is 3 times of the Eart what is the person's weight? 3. A 75-kg woman in an elevator is accelerating upward at a rate of 0.6 m/s. a) What is the net force acting upon the woman? b) What is the gravitational force acting upon the woman? c) What is the normal force pushing upward on the woman's feet? 4. A very large cat sits at the center of a swing. Two scales are attached to the ropes. One scale reads 5 kg. A. What does the second scale read? B. What is the combined weight of the cat and swing? Skg
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