If an object has an angular acceleration larger than zero, its angular ________ must be changing with time.
What will be an ideal response?
velocity
momentum
speed
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The force due to the gravity between two objects depends on the ____,
a. combined mass and velocity of both objects b. mass of each object and the distance between them c. distance of each object from Earth and distance between them d. speed of light and the distance of each object from Earth e. mass of each object and the speed of light
A parachutist jumps out of an airplane and opens her parachute. She then floats downward at a constant rate. Why is she not accelerating?
A. The parachutist exerts a gravitational pull on Earth that is equal to its pull on her. B. As she falls, she is weightless and therefore cannot accelerate. C. The parachute has very little mass, so its inertia is negligible. D. She is accelerating, but gravity's pull is weak at high altitudes. E. The parachute provides an upward force to balance gravity, so the net force is zero.
A child is standing at the rim of a freely rotating disk holding a rock. The disk rotates without friction. The rock is dropped at the instant shown. Which of the following statements is true about the process of dropping the rock?
Three examples of a heat mover are __________, __________, and __________
Fill in the blank(s) with correct word