Physics, 02.09.2019 23:30 crysderria
Bill throws a tennis ball to his dog. he throws the ball at a speed of 15 m/s at an angle of 30° to the horizontal. assume he throws the ball from ground level.
a. if bill and his dog start in the same place, how fast should his dog run to intercept the ball exactly as it lands on the ground? (2 points)
b. how fast should the dog run to get to where the ball will be at a height of 2m as it falls back toward the ground, and to get there 0.5 seconds before the ball gets there? (hint: in this problem, you will need to consider both the x- and y-coordinates of the ball's position.) (1 point)
Answers: 2
Physics, 22.06.2019 01:30
Astone is dropped with no initial velocity from the top of a cliff and hits the ground a time of 3.9 s later. what is the height of the cliff, in units of meters? you may assume that air resistance is negligible. give the answer as a positive number question 15 a figure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 200 o 20.9 12000 o 3.33
Answers: 2
Physics, 22.06.2019 03:00
Isla’s change in velocity is 30 m/s, and hazel has the same change in velocity. which best explains why they would have different accelerations? isla had negative acceleration, and hazel had positive. isla had a different time than hazel. isla had positive acceleration, and hazel had negative. isla went a farther distance than hazel.
Answers: 1
Physics, 22.06.2019 06:30
The energy of a photon was found to be 3.38 × 10–19 j. planck’s constant is 6.63 × 10–34 j • s. which color of light corresponds to this photon?
Answers: 2
Bill throws a tennis ball to his dog. he throws the ball at a speed of 15 m/s at an angle of 30° to...
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