Suppose you are carrying a ball and running at constant speed, and wish to throw the ball and catch it as it comes back down. You should
1.throw the ball at an angle of about 45° above the horizontal and maintain the same speed.
2.throw the ball straight up in the air and slow down to catch it.
3.throw the ball straight up in the air and maintain the same speed.
3
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You are walking around on a solid surface; the surface gravity is comfortable, but it is "hot as hell." It feels as if your eyeballs are being squeezed, and your insides are queasy (due to the high pressure—almost like being deep in the ocean)
Your life-support belt is corroding. The Sun, barely visible through the haze, is near your meridian; you hope for nightfall (unaware that it would provide no substantial relief), but you already have been stuck on this planet for 72 hours, and the Sun seems not to have moved through the sky (and, if it moved at all, it moved eastward from the meridian).
The turntable of a record player has an angular velocity of 8.0 rad/s when it is turned off. The turntable comes to rest 2.5 s after being turned off. Through how many radians does the turntable rotate after being turned off? Assume constant angular acceleration
a. 12 rad b. 8.0 rad c. 10 rad d. 16 rad e. 6.8 rad
Household circuits are wired in parallel. Adding more appliances to a parallel circuit
A. increases the voltage sent to each appliance. B. decreases the current sent to each appliance C. increases the current drawn from the circuit but does not change the current to each appliance.
An automobile travels due north with a constant speed of 76 km/h. All forces considered, the unbalanced force acting on the auto is
a. zero. b. southward. c. northward. d. downward. e. upward.