Physics, 20.10.2020 03:01 hargurgill20
Lilly is playing catch with her younger brother. Her brother goes in to get a drink, leaving Lilly in the backyard. She tosses the ball straight up as hard as she can possibly throw.
Which of the following correctly describes the forces acting on the ball after it has left Lilly’s hand?
A
The force from Lilly’s hand decreases as the ball goes up to its maximum height, then the force of gravity causes the ball to fall back to the ground.
B
The force from Lilly’s hand decreases as the force of gravity increases until the ball stops and begins to fall as the force of gravity increases until the ball hits the ground.
C
The only force acting on the ball is the force of gravity. Once the ball leaves Lilly’s hand, it rises to a peak height where the ball begins to fall back to the ground.
D
The only force acting on the ball after Lilly throws the ball up is the force from her hand. The ball rises to a peak height, then the gravitational force causes the ball to fall back to the ground.
Answers: 2
Physics, 22.06.2019 10:30
Air is to be preheated by hot exhaust gases in a cross-flow heat exchanger before it enters the furnace. air enters the heat exchanger at 95 kpa and 20°c at a rate of 0.6 m^3/s. the combustion gases (cp = 1.10 kj/kg°c) enter at 160°c at a rate of 0.95 kg/s and leave at 95°c. determine the rate of heat transfer to the air and its outlet temperature.
Answers: 2
Physics, 22.06.2019 14:30
What distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?
Answers: 1
Physics, 23.06.2019 05:30
If a rock weighing 54 n is submerged in a liquid with a density exactly twice that of water, what will be its new apparent weight reading in the liquid?
Answers: 3
Lilly is playing catch with her younger brother. Her brother goes in to get a drink, leaving Lilly i...
History, 27.09.2020 14:01
Mathematics, 27.09.2020 14:01
Chemistry, 27.09.2020 14:01
Mathematics, 27.09.2020 14:01
Mathematics, 27.09.2020 14:01
Mathematics, 27.09.2020 14:01
Biology, 27.09.2020 14:01
Mathematics, 27.09.2020 14:01
Mathematics, 27.09.2020 14:01
Mathematics, 27.09.2020 14:01
English, 27.09.2020 14:01
Mathematics, 27.09.2020 14:01