Homework Answers
a) for the work done
work done on the snowball = mgh
work done on the snowball = 1.5 * 9.8 * 13
work done on the snowball = 191.1 J
b) for the change in gravitational potential energy system
change in gravitational potential energy system = - work done by gravity
change in gravitational potential energy system = - 191.1 J
c)
at the ground
gravitational potential energy of the ball= change in gravitational potential energy
gravitational potential energy of the ball = - 191.1 J
Add Answer to:
A 1.50 kg snowball is fired from a cliff 13.0 m high. The snowball's initial velocity...
A 2.40 kg snowball is fired from a cliff 14.2 m high. The snowball's initial velocity...
A 2.40 kg snowball is fired from a cliff 14.2 m high. The snowball's initial velocity is 17.9 m/s, directed 26.0° above the horizontal. (a) How much work is done on the snowball by the gravitational force during its flight to the flat ground below the cliff? (b) What is the change in the gravitational potential energy of the snowball-Earth system during the flight? (c) If that gravitational potential energy is taken to be zero at the height of the...
Projectile Motion: An object is fired into a projectile with an initial velocity of 250 m/s at an angle of 60° with resp...
Projectile Motion: An object is fired into a projectile with an initial velocity of 250 m/s at an angle of 60° with respect to the horizontal. a) What is the maximum height it reaches? b) What is the maximum horizontal distance it reaches? c) What is the time of flight of the particle? d) What is its velocity as it reaches the ground? e) Locate the object after 6 seconds.
You drop a 2.50 kg textbook to a friend who stands on the ground at distance...
You drop a 2.50 kg textbook to a friend who stands on the ground
at distance D = 10.0 m below. Your friend's outstretched hands are
at distance d = 1.50 m above the ground.
(a) How much work Wg does the gravitational force do on the book
as it drops to her hands?
(b) What is the change ΝU in the gravitational potential energy
of the textbook-Earth system during the drop?
(c) If the gravitational potential energy of that...
You drop a 2.50 kg textbook to a friend who stands on the ground at distance...
You drop a 2.50 kg textbook to a friend who stands on the ground
at distance D = 10.0 m below. Your friend's outstretched hands are
at distance d = 1.50 m above the ground.
(a) How much work Wg does the gravitational force do on the book
as it drops to her hands?
(b) What is the change ΝU in the gravitational potential energy
of the textbook-Earth system during the drop?
(c) If the gravitational potential energy of that...
1.) An object is dropped from a height of 200 m. What is its velocity as it reaches the ground? How long time) before i...
1.) An object is dropped from a height of 200 m. What is its velocity as it reaches the ground? How long time) before it reaches the ground? 2.) An object is fired into a projectile with an initial velocity of 250 m/s at an angle of 60° with respect to the horizontal. What is maximum height it reaches? What is the maximum horizontal distance it reaches? What is the time of flight of the projectile? What is its velocity...
A cat's crinkle ball toy of mass 35 g is thrown straight up with an initial...
A cat's crinkle ball toy of mass 35 g is thrown straight up with an initial speed of 7 m/s. Assume in this problem that air drag is negligible. (a) What is the kinetic energy of the ball (in J) as it leaves the hand? (b) How much work is done (in J) by the gravitational force during the ball's rise to its peak? (c) What is the change in the gravitational potential energy of the ball (in J) during...
A 60.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial...
A 60.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 124 m/s from the top of a cliff 144 m above level ground, where the ground is taken to be y = 0. (a) What is the initial total mechanical energy of the projectile? (Give your answer to at least three significant figures.) (b) Suppose the projectile is traveling 87.9 m/s at its maximum height of y = 304 m. How much...
A 44.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial...
A 44.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 128 m/s from the top of a cliff 160 m above level ground, where the ground is taken to be y = 0. (a) What is the initial total mechanical energy of the projectile? (Give your answer to at least three significant figures.) ____J (b) Suppose the projectile is traveling 90.7 m/s at its maximum height of y = 331 m. How...
A bullet is fired at a speed of 15 m/s from the edge of a cliff....
A bullet is fired at a speed of 15 m/s from the edge of a cliff. The bullet strikes the ground 65 m from a height H. Find the final velocity of the bullet
You drop a 2.50 kg textbook to a friend who stands on the ground
at distance D = 10.0 m below. Your friend's outstretched hands are
at distance d = 1.50 m above the ground.
(a) How much work Wg does the gravitational force do on the book
as it drops to her hands?
(b) What is the change ΝU in the gravitational potential energy
of the textbook-Earth system during the drop?
(c) If the gravitational potential energy of that...
You drop a 2.50 kg textbook to a friend who stands on the ground
at distance D = 10.0 m below. Your friend's outstretched hands are
at distance d = 1.50 m above the ground.
(a) How much work Wg does the gravitational force do on the book
as it drops to her hands?
(b) What is the change ΝU in the gravitational potential energy
of the textbook-Earth system during the drop?
(c) If the gravitational potential energy of that...
1.) An object is dropped from a height of 200 m. What is its velocity as it reaches the ground? How long time) before it reaches the ground? 2.) An object is fired into a projectile with an initial velocity of 250 m/s at an angle of 60° with respect to the horizontal. What is maximum height it reaches? What is the maximum horizontal distance it reaches? What is the time of flight of the projectile? What is its velocity...
A 60.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 124 m/s from the top of a cliff 144 m above level ground, where the ground is taken to be y = 0. (a) What is the initial total mechanical energy of the projectile? (Give your answer to at least three significant figures.) (b) Suppose the projectile is traveling 87.9 m/s at its maximum height of y = 304 m. How much...
Most questions answered within 3 hours.
-
A hospital performs 100 surgeries per week. The probability that
complications after surgery occur is 10%....
asked 56 minutes ago -
1 point) Given the significance level α=0.01 find the following:
(a) left-tailed z value z= (b)...
asked 38 minutes ago -
Assuming you are the head of the software development unit at
Cyber.Soft, explain and justify why...
asked 4 minutes ago -
Magnesium and nitrogen react in a combination reaction to
produce magnesium nitride. 3 Mg + N2...
asked 12 minutes ago -
Two electrons are initially at rest separated by a distance of
2nm. At time t=0, they...
asked 10 minutes ago -
A martial artist is practicing breaking 5 boards. He is able to
break aboard with probability...
asked 17 minutes ago -
The rate constant of a first-order reaction is 2.95 × 10−4 s−1
at 350.° C. If...
asked 20 minutes ago -
implement a class called PiggyBank that will be used to
represent a collection of coins. Functionality...
asked 11 minutes ago -
2. Use the following information in the table to answer the
following questions. (Numbers are in...
asked 17 minutes ago -
The fuel economy of a 2011 Lexus RX 350 2wd 6 cylinder 3.5 L
automatic 5...
asked 25 minutes ago -
i.
the synthesized compund 2-bromo-butanal i have a IR peak at about
3200 and one at...
asked 25 minutes ago -
A
752 mL sample of water was placed in a 1000 gram pan of aluminum.
The...
asked 36 minutes ago