1) An archer fires an arrow from a bow. The arrow’s mass is 0.088 kg, and...
1) An archer fires an arrow from a bow. The arrow’s mass is 0.088 kg, and an average force of 110 N is exerted by the bowstring over a 0.78 m distance. Calculate the velocity of the arrow just after it is released by the bowstring by two methods:
a) Calculate the arrow’s acceleration that is caused by the bowstring, and use kinematic equations to calculate the velocity at the end of the acceleration. Assume a constant acceleration that corresponds to the given average force.
b) Use the work‐energy theorem to calculate the velocity.
2) A roller coaster car starts from rest at the top of a hill 15 m high and rolls down to ground level. From there it starts into a vertical loop. Exactly at the top of the loop it is 10 m high and the radius of the curvature of the track is 4.0 m. Assuming negligible friction and air resistance, what is the magnitude of the normal force acting on a 65 kg passenger at the top of the loop?
Homework Answers
Add Answer to:
1) An archer fires an arrow from a bow. The arrow’s mass is
0.088 kg, and...
When an archer pulls an arrow back in his bow, he is storing potential energy in...
When an archer pulls an arrow back in his bow, he is storing potential energy in the stretched bow. (a) Compute the potential energy stored in the bow, if the arrow of mass 5.05 10-2 kg leaves the bow with a speed of 32.0 m/s. Assume that mechanical energy is conserved. (b) What average force must the archer exert in stretching the bow if he pulls the string back a distance of 30.0 cm?
(35 points total) An archer shoots an arrow with an initial speed of 45 m/s, at...
(35 points total) An archer shoots an arrow with an initial speed of 45 m/s, at an angle of 70° from the horizontal. a) How much time does it take to reach the top of its trajectory? b) What is its velocity (magnitude and direction) at the top of its trajectory? c) What is its acceleration (magnitude and direction) at the top of its trajectory? d) How high does it go? e) Assume that the arrow hits the ground 2...
physics questions help. A 6 kg mass is swung in a horizontal circle at the end...
physics questions help.
A 6 kg mass is swung in a horizontal circle at the end of an 80 cm long string. The mass starts from rest and accelerates at a constant rate, going through 5 revolutions in 3 seconds. What is the tension in the string? A roller coaster car is to go down a hill and then around a loop-the-loop with a 7 m radius. How high does the hill need to be for the car to lost...
A roller-coaster car (mass = 988 kg including passengers) is about to roll down a track....
A roller-coaster car (mass = 988 kg including passengers) is about to roll down a track. The diameter of the circular loop is 21.5 m and the car starts out from rest 36.2 m above the lowest point of the track. Ignore friction and air resistance. X is the how high the car is= 36.2 m Y is the diameter of the loop= 21.5 m. What is the force exerted on the car by the track at the top of...
35 & 36 Back to 'Energy & Work 35 A 219 gram cart starts from rest...
35 & 36
Back to 'Energy & Work 35 A 219 gram cart starts from rest and rolls down an inclined plane from a height of 0.678 m. Determine its speed at a helght of 0.387 m above the bottom of the Incline. 1.00 Question 36 A 3639 kg roller coaster car starts from rest at the top of a 35.1 m high track. Determine the speed of the car at the top of a loop that is 10.1 m...
I need help with problem 39 parts b,c,d Unit 7. Work and Energy In Class Packet...
I need help with problem 39 parts b,c,d
Unit 7. Work and Energy In Class Packet Name: 36. A 2.45 kg rock is dropped from the top of a 15.5 m vertical cliff a. What is the potential energy of the rock relative to the base of the cliff before it is dropped? b. What is the kinetic energy of the rock just before it hits the ground below? c. What is the velocity of the rock at a point...
(10%) Problem 10: Modem roller coasters have vertical loops like the one shown in the figure....
(10%) Problem 10: Modem roller coasters have vertical loops like the one shown in the figure. The radius of curvature is smaller at the top than on the sides so that the downward centripetal acceleration at the top will be greater than the acceleration due to gravity, keeping the passengers pressed firmly into their seats. Otheexpertta.com * 33% Part (a) What is the speed of the roller coaster in m/s at the top of the loop if the radius of...
Can u answer this in details please, thank u! A 2000 kg roller coaster car travels...
Can u answer this in details please, thank u! A 2000 kg roller coaster car travels at a constant 20 m/s speed around a vertical circular track with a 10 meter radius of curvature: A. Draw a free-body diagram of the car at the top of the loop. B. Calculate the normal force on the car at the top of the loop. C. Where along the loop would the normal force be largest on this car?
? A roller coaster car has a mass of 800 kg. It is launched horizontally from...
?
A roller coaster car has a mass of 800 kg. It is launched horizontally from a giant spring (spring constant 35 kN/m), rolls 10m and then goes through a vertical loop-the-loop track of radius 7 m. On average, for every meter the car rolls on the track, thermal energy increases by 800 J. The designer, who wants to go home for the weekend, says that compressing the spring 3 m should give the car enough energy to safely go...
A 120 kg roller coaster starts from rest at point A and slides down the frictionless loop-the-loop shown in the accompanying figure
A 120 kg roller coaster starts from rest at point A and slides down the frictionless loop-the-loop shown in the accompanying figure. a) How fast is this roller coaster moving at point B? b) Calculate the normal force exerted on the car at point B B 24.00 m 25.0 m 12.0 m 3.00 m Upload your answer/solution once you finish each given problem.
physics questions help.
A 6 kg mass is swung in a horizontal circle at the end of an 80 cm long string. The mass starts from rest and accelerates at a constant rate, going through 5 revolutions in 3 seconds. What is the tension in the string? A roller coaster car is to go down a hill and then around a loop-the-loop with a 7 m radius. How high does the hill need to be for the car to lost...
35 & 36
Back to 'Energy & Work 35 A 219 gram cart starts from rest and rolls down an inclined plane from a height of 0.678 m. Determine its speed at a helght of 0.387 m above the bottom of the Incline. 1.00 Question 36 A 3639 kg roller coaster car starts from rest at the top of a 35.1 m high track. Determine the speed of the car at the top of a loop that is 10.1 m...
I need help with problem 39 parts b,c,d
Unit 7. Work and Energy In Class Packet Name: 36. A 2.45 kg rock is dropped from the top of a 15.5 m vertical cliff a. What is the potential energy of the rock relative to the base of the cliff before it is dropped? b. What is the kinetic energy of the rock just before it hits the ground below? c. What is the velocity of the rock at a point...
(10%) Problem 10: Modem roller coasters have vertical loops like the one shown in the figure. The radius of curvature is smaller at the top than on the sides so that the downward centripetal acceleration at the top will be greater than the acceleration due to gravity, keeping the passengers pressed firmly into their seats. Otheexpertta.com * 33% Part (a) What is the speed of the roller coaster in m/s at the top of the loop if the radius of...
?
A roller coaster car has a mass of 800 kg. It is launched horizontally from a giant spring (spring constant 35 kN/m), rolls 10m and then goes through a vertical loop-the-loop track of radius 7 m. On average, for every meter the car rolls on the track, thermal energy increases by 800 J. The designer, who wants to go home for the weekend, says that compressing the spring 3 m should give the car enough energy to safely go...
A 120 kg roller coaster starts from rest at point A and slides down the frictionless loop-the-loop shown in the accompanying figure. a) How fast is this roller coaster moving at point B? b) Calculate the normal force exerted on the car at point B B 24.00 m 25.0 m 12.0 m 3.00 m Upload your answer/solution once you finish each given problem.
Most questions answered within 3 hours.
-
Please explain steps:
An 80 kg swimmer steps off a platform 10 m above the water...
asked 9 minutes ago -
A lottery exists where balls numbered 1 to 17 are placed in an
urn. To win,...
asked 12 minutes ago -
26) Briefly describe, using words or simple diagrams, the
chemiosmotic theory for coupling oxidation to phosphorylation...
asked 2 hours ago -
Suppose that XX is a random variable with mean 16 and standard
deviation 5 . Also...
asked 2 hours ago -
Calculate the number density of argon gas at a temperature of
24C and a pressure of...
asked 6 hours ago -
Alternative
Classification
How to Estimate
Probabilities from Data? ( For continuous Attributes)
And How to generate...
asked 6 hours ago -
An explosion breaks a 20.0-kg object into three parts. The
object is initially moving at a...
asked 7 hours ago -
Calculate the approximate number of residues of Rubisco, which
is involved in carbon fixation in plants,...
asked 8 hours ago -
Other decisions about scientific claims can have a much broader
impact.ENERGYarrow-10x10.png, environment, health, security - all...
asked 8 hours ago -
I need to write a research paper and work cited about this
topic: The United States...
asked 9 hours ago -
Hello! I was wondering if I could have some help?
If the vapor pressure of carvone...
asked 9 hours ago -
An economist wants to estimate the mean per capita income (in
thousands of dollars) for a...
asked 10 hours ago