In the absence of air resistance, a boulder and a pebble dropped from rest will fall with equal
1) forces of gravity.
2) accelerations.
3) energies.
4) all these.
The reason that this quantity is not greater for the boulder than the pebble is that
5) both the boulder and the pebble fall at the same speed.
6) the initial potential energies of each is the same.
7) gravitational force acting on each is the same.
8) the greater gravitational force on the boulder acts on a correspondingly greater mass.
Answer: 2, 8
You might also like to view...
A person has a thermal conductivity of 0.18 W/m·K between his inner core and his skin with an effective shell thickness of 1.30 cm between his core and skin. If his inner core is at the normal 98.6°F, and his skin has a surface area of 1.62 m2, what will be his rate of loss of thermal energy due to conduction through his skin if his skin temperature is 28.3°C?
a. 150 W b. 158 W c. 316 W d. 195 W e. 254 W
A heat engine has an efficiency of 35.0% and receives 150 J of heat per cycle. How much work does it waste in each cycle?
What will be an ideal response?
The hydrogen in our solar system was created from subatomic particles in ______
a. the Earth b. our sun c. Jupiter d. the Big Bang e. supernovas
Wave interference occurs for
A) sound waves. B) light waves. C) water waves. D) all of the above E) none of the above