Physics, 15.07.2020 18:01 hunterkerlin20p3l6ff
Velocity of a Ball Thrown into the Air The position function of an object moving along a straight line is given by s = f(t). The average velocity of the object over the time interval [a, b] is the average rate of change of f over [a, b]; its (instantaneous) velocity at t = a is the rate of change of f at a. A ball is thrown straight up with an initial velocity of 96 ft/sec, so that its height (in feet) after t sec is given by s = f(t) = 96t − 16t2. (a) What is the average velocity of the ball over the following time intervals? [4, 5] ft/sec [4, 4.5] ft/sec [4, 4.1] ft/sec (b) What is the instantaneous velocity at time t = 4? ft/sec (c) What is the instantaneous velocity at time t = 5? ft/sec Is the ball rising or falling at this time? rising falling (d) When will the ball hit the ground? t = sec
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Physics, 22.06.2019 04:30
In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.
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Physics, 22.06.2019 16:00
Rank the six combinations of electric charges on the basis of the electric force acting on q1. define forces pointing to the right as positive and forces pointing to the left as negative. rank positive forces as larger than negative forces. q1,q2,q3 = positive(+) q1 = + q2 = + q3 = - q1 = + q2= - q3= + q1= - q2= + q3= + q1= + q2= - q3= - q1,q2,q3 = negative
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Physics, 22.06.2019 16:30
An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. but she does have devices to measure distance and time accurately. she knows her own mass is 77.4 kg , but she is unsure of the mass of a large gas canister in the airless rocket. when this canister is approaching her at 3.50 m/s , she pushes against it, which slows it down to 1.30 m/s (but does not reverse it) and gives her a speed of 2.60 m/s . what is the mass of the canister?
Answers: 1
Velocity of a Ball Thrown into the Air The position function of an object moving along a straight li...
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