1.A system that consists of a single, solid object with a mass of 5.00 kilograms is...
1.A system that consists of a single, solid object with a mass of 5.00 kilograms is moving horizontally at a constant velocity of 6.00 m/s. Calculate the total energy of the system.
A- 180 Joules
B- 90 Joules
C- 75 Joules
D- 15 Joules
2. A system consists of a golf ball in flight and Earth. The golf ball has a weight of 1 N. How much potential energy does the system have when the golf ball is 10 m above the ground and has a velocity of 10 m/s?
A- 0 J
B- 10 J
C- 100 J
D- 1000 J
3. Which of the following scenarios best describe an increase in an object's kinetic energy?
A- A box, moving with some initial velocity, experiences a negative acceleration due to friction between the box and the floor, and comes to a stop.
B- A person does work on a box by pulling it forward with a rope. While being pulled, the box moves at a constant velocity.
C- Two people are in a game of tug of war (pulling on a rope in opposite directions). After a grueling thirty minutes, neither person has managed to move the other.
D- A person moves, by pushing, a box filled with hockey gear across a sheet of ice. Upon further inspection, the only force applied to the box is the force of the person pushing on the box.
Homework Answers
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1.A system that consists of a single, solid object with a mass
of 5.00 kilograms is...
You pull a your friend along in a sled (combined mass is 65 kg), by pulling...
You pull a your friend along in a sled (combined mass is 65 kg), by pulling the rope at an upward angle of 20 degrees with respect to the ground with enough force to keep the sled moving at a constant velocity of <3,0, 0> m/s. The coefficient of kinetic friction between the ground and the sled is 0.15. (a) Draw a force diagram for the friend/sled system. (b) Once you get to constant velocity, you pull the sled 15...
1) A simple pendulum consists of an object with mass m attached to a string with...
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on a frictionless table collides with a stationary 7. A 10 kg ball moving at a...
on a frictionless table collides with a stationary 7. A 10 kg ball moving at a velocity of 2 m/s 5 kg ball. Find the final velocity of each ball if the collision is inelastic? If the collision is elastic and the 10 kg ball comes to a complete stop, what is the final velocity of the second ball? 8. A woman stands at the center of a platform. She is holding a dumb-bell in each hand, and outstretched. The...
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6. An explosion breaks an object initially at rest into two pieces, one of which has 3.0 times the mass of the other. If 7100 J of kinetic energy were released in the explosion, how much kinetic energy did the heavier piece acquire? Joules 7. A billiard ball is shot west at 2.20 m/s. A second, identical billiard ball is shot cast at 1.80 m/s. The balls has a glancing collision, not a head-on- collision, deflecting the second ball by...
Problem (1) (40 points) A pendulum consisting of a ball of mass m and a massless string of length L 5.00 m is relea...
Problem (1) (40 points) A pendulum consisting of a ball of mass m and a massless string of length L 5.00 m is released from an angle of a 69 88 shown in the figure and strikes a block of mass M 2m. The block slides a distance D before stopping under the action of a constant friction force with the frio- tion constant μ": 0.50. The ball rebounds to an angle of Hints: Take g= 10 m/?. sin 16"...
(1) Suppose you lift a stone that has a mass of 5.3 kilograms off the floor...
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6) A mass-spring system consists of a 250-g mass hanging from a spring with a spring constant of k 0.18 J/m2. The mass is pulled down 7.1 cm from its equilibrium position and released from re a) How much work did the person do when she pulled the spring down from its equilibrium position? Assume that the mass was at rest before she pulled it down, and before it was released. (Use the energy-interaction model, not the expression W FavgAx,...
1) Which term best describes an object's resistance to a change in motion A) Force B)...
1) Which term best describes an object's resistance to a change in motion A) Force B) Inertia C) Acceleration D) Resistance 2) Two skaters, Cathy and Mike, are standing on a frozen pond. Mike has twice the mass as Cathy. If Mike pushes to the left on Cathy, what can be said about the forces and accelerations on each person? A) Cathy experiences a force and acceleration to the left, while Mike experiences an equal force in the opposite direction....
1-4 using Work-Energy Theorem/KE and PE thank you! not 1. An object of mass 0.5kg is...
1-4
using Work-Energy Theorem/KE and PE
thank you!
not 1. An object of mass 0.5kg is projected from ground at 40m/s. Find the work done by gravity on the object, when it is at (a) 10m above the ground -49 Joules (b) 15m above the ground.- 73.5 Joules (c) Find the potential energy of the object in (a) and (b) relative to the ground. PE-mgh 49 J/73.55 2. A block of is sliding down a slope as shown in the...
Please show work! A pulley of negligible mass is attached to a block weighing 504 N. A person uses the rope and pulley s...
Please show work!
A pulley of negligible mass is attached to a block weighing 504
N. A person uses the rope and pulley system illustrated in the
figure to lift the block at a constant velocity. The pulleys and
rope are all ideal.
F_G=____________ ?
A. Draw the free body diagram for the block. (Observe that three
are two rope segments pulling on the block.)
B. Apply Newton's first law and determine the tension in the
rope, and thus, the...
on a frictionless table collides with a stationary 7. A 10 kg ball moving at a velocity of 2 m/s 5 kg ball. Find the final velocity of each ball if the collision is inelastic? If the collision is elastic and the 10 kg ball comes to a complete stop, what is the final velocity of the second ball? 8. A woman stands at the center of a platform. She is holding a dumb-bell in each hand, and outstretched. The...
6. An explosion breaks an object initially at rest into two pieces, one of which has 3.0 times the mass of the other. If 7100 J of kinetic energy were released in the explosion, how much kinetic energy did the heavier piece acquire? Joules 7. A billiard ball is shot west at 2.20 m/s. A second, identical billiard ball is shot cast at 1.80 m/s. The balls has a glancing collision, not a head-on- collision, deflecting the second ball by...
Problem (1) (40 points) A pendulum consisting of a ball of mass m and a massless string of length L 5.00 m is released from an angle of a 69 88 shown in the figure and strikes a block of mass M 2m. The block slides a distance D before stopping under the action of a constant friction force with the frio- tion constant μ": 0.50. The ball rebounds to an angle of Hints: Take g= 10 m/?. sin 16"...
6) A mass-spring system consists of a 250-g mass hanging from a spring with a spring constant of k 0.18 J/m2. The mass is pulled down 7.1 cm from its equilibrium position and released from re a) How much work did the person do when she pulled the spring down from its equilibrium position? Assume that the mass was at rest before she pulled it down, and before it was released. (Use the energy-interaction model, not the expression W FavgAx,...
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1-4
using Work-Energy Theorem/KE and PE
thank you!
not 1. An object of mass 0.5kg is projected from ground at 40m/s. Find the work done by gravity on the object, when it is at (a) 10m above the ground -49 Joules (b) 15m above the ground.- 73.5 Joules (c) Find the potential energy of the object in (a) and (b) relative to the ground. PE-mgh 49 J/73.55 2. A block of is sliding down a slope as shown in the...
Please show work!
A pulley of negligible mass is attached to a block weighing 504
N. A person uses the rope and pulley system illustrated in the
figure to lift the block at a constant velocity. The pulleys and
rope are all ideal.
F_G=____________ ?
A. Draw the free body diagram for the block. (Observe that three
are two rope segments pulling on the block.)
B. Apply Newton's first law and determine the tension in the
rope, and thus, the...
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