a. weight
1. an object on earth and the same object on the moon would have a difference in
a. weight
b. mass
c. weight and mass
d. none of the above
2. how does doubling the mass of one object and tripling the distance between another object change the gravitational force between them?
fg = g m1 m2 / r2
a. force changes by 2/3
b. force changes by 2/9
c. force increases by 9
d. force decreases by 3
e. no change in force
3. according to the scientific definition of work, pushing on a rock accomplishes no work unless there is
a. a net force.
b. movement.
c. an opposing force.
d. movement in the same direction as the direction of the force.
4. a car going 30 mph has a kinetic energy of 10,000 joules. how much kinetic energy does it have if it goes 60 mph?
a. 40,000 joules
b. 10,000 joules
c. 5,000 joules
d. 2,500 joules
e. 20,000 joules
5. the specific heat of soil is 0.20 kcal/kgc° and the specific heat of water is 1.00 kcal/kgc°. this means that if 1 kg of soil and 1 kg of water each receive 1 kcal of energy, ideally,
a. the water will be 5°c.
b. the water will be warmer than the soil by 0.8°c.
c. the soil will be 5°c.
d. the water will warm by 1°c, and the soil will warm by 0.2°c.
Answers: 1
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1. an object on earth and the same object on the moon would have a difference in
a. weight
a. weight
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