Home » 1. What is Hooke’s law? How to calculate the restoring force? 2. Why is there a negative sign in front

# 1. What is Hooke’s law? How to calculate the restoring force? 2. Why is there a negative sign in front

1. What is Hooke’s law? How to calculate the restoring force? 2. Why is there a negative sign in front of the restoring force?3. Mechanical springs are energy-storing devices. How to calculate the stored elastic energy?4. What is the difference between a spring scale and a balance scale

Energy and Projectile Motion Purpose: The purpose of this experiment is to investigate conservation of mechanical energy, and the relationship

Grade 11 Thermal energy and heat: This question states “An ice cube with a mass of 50.0g is transferred directly
Grade 11 Thermal energy and heat: This question states “An ice cube with a mass of 50.0g is transferred directly from the freezer at a temperature of -9.00 Celsius to a polystyrene cup containing 150.0 g of water at 95.0 Celsius. Calculate the final temperature of the water. Ignore any heat loss to the cup and it’s surroundings. ” 1) the part that I highlighted, why did they use the specific heat capacity of water (4200 J) instead of ice (2100J) since they are using the mass of the ice (0.050kg) 2) it is cut off but the answer is T= 50˙C

-Aisha throws a 0.60-kg ball upward. Frances, standing on a balcony above Aisha, catches the ball by exerting a
-Aisha throws a 0.60-kg ball upward. Frances, standing on a balcony above Aisha, catches the ball by exerting a 1.0-N downward force on the ball. Determine the acceleration of the ball during the time interval when Frances is catching it. (answer is not -1.67m/s^2) -A friend drops a 0.625-kg basketball from 2.6 m above you.a. Determine the force that the basketball exerts on your hands while you are catching it. Assume you decelerate the ball over a distance of 1 m. b. Determine the force that you have to exert on the ball to catch it.

-Find the flare’s maximum height if it is fired on the level salt flats of Utah.-Find the distance from its
Physics Assignment Writing Service-Find the flare’s maximum height if it is fired on the level salt flats of Utah.-Find the distance from its firing point to its landing point if it is fired on the level salt flats of Utah.-Find the flare’s maximum height if it is fired over the flat Sea of Tranquility on the Moon, where g = 1.67 m/s^2-Find the distance from its firing point to its landing point if it is fired over the flat Sea of Tranquility on the Moon, where g=1.67 m/s^2

A fisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on
A fisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. It takes a time of 2.70 s for the boat to travel from its highest point to its lowest, a total distance of 0.640 m. The fisherman sees that the wave crests are spaced a horizontal distance of 5.60 m apart.Part AHow fast are the waves traveling?Express the speed v in meters per second using three significant figures.Part BWhat is the amplitude A of each wave?Express your answer in meters using three significant figures.

Consider a long line of charge with linear charge density lumda= 4 micro C/m and a point charge q =
Consider a long line of charge with linear charge density lumda= 4 micro C/m and a point charge q = −2 micro C with mass m = 0.1 kg at coordinate 2,3 . The point charge is launched from (2,3) with v = 2000 m/s at an angle of 20° with respect to the x-axis. Find the velocity of the point charge when its x-coordinate is 5.

A participant in a study of the biomechanics of kicking a soccer ball performed a knee extension action while kinematic
A participant in a study of the biomechanics of kicking a soccer ball performed a knee extension action while kinematic data were recorded (shown as the angular movement from points a to b in the figure below). The relative knee angle prior to the beginning of the movement (i) was 72°, and the relative knee angle at the end of the movement (ii) was 149°. The time taken for the movement to proceed from positions a to b was 0.34 seconds. The distance from the participant’s knee to his ankle was 47.9 cm. What was the tangential velocity of the ankle joint during the movement (in m/s)?Express your answer in m/s to two decimal places (do not include units in your answer).

1 A fire truck and a police car both respond to an accident. The fire truck has a siren that
1 A fire truck and a police car both respond to an accident. The fire truck has a siren that makes a sound at 800 Hz if standing still. The police car’s siren sounds at 1500 Hz if standing still. (Note: the speed of sound in air is 343 m/s)a If the fire truck is already parked at the accident and the police car is approaching at a speed of 30 m/s, what is the frequency observed by the fire truck driver for the police car’s siren?b. If the police car is already parked at the accident and the fire truck is approaching at a speed of 25 m/s, what frequency is observed by the police officer for the fire truck’s siren?c. If the fire truck is driving toward the accident from the opposite direction as the police car, and the police car is moving at 35 m/s and the fire truck is moving at 25 m/s, what frequencies do they both hear for each other’s sirens? (Note this is two questions and you will have a different answer for each)d. Are these sounds higher, lower or about the same in pitch compared to standing still? Are these sounds higher, lower or about the same in volume compared to standing still? explain

Look at the roller coaster track in this image. Assume no energy is lost to friction as the roller coaster
Look at the roller coaster track in this image. Assume no energy is lost to friction as the roller coaster travels around the track.The total mass of the roller coaster is 650 kg. Use the measurements shown in the image and your knowledge of conservation of energy to answer the following questions. 1. Show all of your work as you answer these questions. a) If it takes a force of 3943 N [parallel to the track] to pull the roller coaster up to point A, and it is pulled along 105 m of track, find the work done on the roller coaster. b) Find the total energy the roller coaster has at point A if it is at rest for a brief moment before it starts to go down the hill. c) According to the Law of Conservation of Energy, what will the total energy of the roller coaster be at points B and C? d) Use the Law of Conservation of Energy to find the speed of the roller coaster at point B. e) If it takes the motor 20.0 s to pull the roller coaster to point A, find the power of the motor. f) In real life, some of the energy the roller coaster has at point A will be lost as thermal energy due to friction as it travels through the track. If the speed of the roller coaster at point C is only 19 m/s, calculate the amount of energy that was lost due to friction.

Hi there, This is apart of my AP Physics assignment due this evening at 11:00. I was able to calculate
Hi there, This is apart of my AP Physics assignment due this evening at 11:00. I was able to calculate all the values you see have a check mark ; however, all the problems that have an X or are blank are the ones I dont understand which is the 4 and 5 acceleration, experimental acceleration and % error. I asked my teacher for help, but they didnt give the help at all. Can you please help me? Thank you !

## Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
\$26
The price is based on these factors:
Number of pages
Urgency
Basic features
• Free title page and bibliography
• Unlimited revisions
• Plagiarism-free guarantee
• Money-back guarantee
On-demand options
• Writer’s samples
• Part-by-part delivery
• Overnight delivery
• Copies of used sources
Paper format
• 275 words per page
• 12 pt Arial/Times New Roman
• Double line spacing
• Any citation style (APA, MLA, Chicago/Turabian, Harvard)

# Our guarantees

Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.

### Money-back guarantee

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

### Zero-plagiarism guarantee

Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.

### Free-revision policy

Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.