A spring-loaded dart gun is used to shoot a dart straight up into the air, and the dart reaches a maximum height of 24 meters
The same dart is shot up a second time from the same gun, but this time the spring is compressed only half as far (compared to the first shot). How far up does the dart go this time (neglect all friction and assume the spring is ideal)? A) 6.0 m
B) 12 m
C) 3.0 m
D) 48 m
A
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A solid disk and a hollow disk with the same mass and diameter are released together (from rest) to roll down an incline. The solid disk reaches the bottom first. From this information we can say that the angular acceleration was
A. the same for both disks. B. larger for the hollow disk. C. larger for the solid disk. D. impossible to know without a measurement of time.
As the speed of an object increases, its relativistic momentum:
a. stays the same as its classical momentum. b. increases more than its classical momentum. c. increases less than it classical momentum. d. does not change since momentum is a conserved quantity.
If you load up a circuit in your home with too many devices, like lightbulbs or stereos, in ________, then you can overload the circuit and trip a circuit breaker or blow a fuse.
A. duplicate B. series C. parallel D. summer
Suppose a 1.0-kg object traveling rightward at 1.0 m/s hits a 3.0 kg object at rest. Afterward, we observe the lighter object to move leftward with a speed of 0.75 m/s. What impulse did the collision interaction give the smaller object at the expense of the larger?
A. None; the larger object was at rest and so had no momentum to give the smaller object. B. None; the smaller object gave an impulse to larger, not the other way around. C. 0.75 kg·m/s leftward. D. 1.0 kg·m/s leftward. E. 1.75 kg·m/s leftward.