Q4:- Show that the net work done on an object equals the change in kinetic energy of the object?
Q: Can you expend energy without doing any work? Given an example.
A:
Q: As you catch a fast-moving fastball, why is it wise to move your hand in the direction of the ball's…
A: As the hand is moved in the direction of motion of ball, actually will increase the time taken by…
Q: An object is held above the gound and has an initial kinetic energy of 0 J and an initial potential…
A:
Q: A 190 g object is dropped from a height of 7 meters. Calculate the potential and kinetic energy of…
A:
Q: A textbook of mass 1.3 kg is sitting on a table 1.8 m above the ground. Determine the change in…
A:
Q: A 6 gram coin is which is initially at rest is dropped from the observation deck of a skyscraper 500…
A:
Q: weight lifter hold 900N over his head. Is he doing work on weight? EXPLAIN.
A: The work done by the weight lifter can be given as, W=F.d Here, F denotes the force on the object is…
Q: A 0.2 kg ball is rest on edge of the top of a 1 m height table. Does the ball have kinetic energy?…
A: From the question it is given that: Mass of ball: m = 0.2 kg Height of table: 1m
Q: a) determine the force exerted on the piano by the man. b) determine the work exerted on the piano…
A: The free-body diagram of the scenario is given as, Given, Mass, m=390 kg, distance it slides, d=…
Q: A 42 kg seal slides from rest down a ramp into the pool below. The top of the ramp is 1.75 m than…
A:
Q: A baseball of mass 0.25 kg is hit at home plate with a speed of 40 m/s. When it lands in a seat in…
A:
Q: Example 74 Calculating Total Work Done from a Graph A force acting on a particle varies widh , as…
A:
Q: Consider the four possible paths of a body moving through gravity as diagrammed below. Which of the…
A:
Q: A penny is taken from the ground floor to the top of the Empire State Building. Assume that the…
A: a) Penny's kinetic energy just before it hits the road: Use conservation of energy because…
Q: 1-An object of mass m=2kg which is initially at rest is pushed upward by a horizontal force F=…
A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for…
Q: An uncontrolled 850 kg car strikes squarely a motorway crash cushion in which the car is brought to…
A:
Q: A girl Lifes a 30 kg package 2m at constant speed. This takes 0.800 seconds A) determine her average…
A: We know that power P= work done per unit time A) work done W= mgh=30×9.8×2=588J Power P=…
Q: i object 'A' with a mass of 4 kg is lifted vertically 4 m from the ground level; another object 'B'…
A: Mass of a=4 kg Height to which object a is lifted = 4 m Potential energy of a= mgh= 4×9.81×4=156.96…
Step by step
Solved in 2 steps with 2 images
- How much work does gravity do as the coin falls to the water below? Express your answer with the appropriate units. You throw a 5.5 g coin straight down at 4.0 m/s from a 25-m-high bridge. HA Value J %3D Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Part B What is the coin's change in kinetic energy? Express your answer with the appropriate units. HA K = Value Units 2. Submit Request AnswerQuestion 8 This graph shows different types of energy for a roller coaster car that starts at the top of a large hill and goes down to its lowest point at 6 s. Energy of a Roller Coaster Car 500 450 400 According to the graph, what is the most likely relationship between height and potential 350 3 300 energy? 250 200 150 100 50 2 4 8. 10 Time (s) -Mechanical Energy ....... Potential Energy Kinetic Energy Your answer: They are directly related. They are inversely related. There is no relationship between the two. There is not enough information for a conclusion. Energy (kJ)A person of mass 60 Kg climbs a tall building (height 120 m) at a steady pace in 18 minutes. What is the average power generated by the body muscles? a) 65.3 w b) 3920 w c) 5.3 hp
- The work required by Neymar to push a box of soccer balls on a horizontal, frictionless floor to accelerate it from a speed of zero to v is W1. The work required by Neymar to accelerate the box of soccer balls on the same floor, from v to 2v is W2. The ratio of W2 to W1 is The correct answer is 3 but I don't know how they got to that answer1- An object is constrained to move inside a vertical ring near the surface of Earth as shown in the picture. Answer the following questions: What are the forces acting on the object b) is the work done by each force zero, positive or negativel SA ball is dropped from the top of a building. Person A choses the top of the building as a reference choice while person B choses the bottom. Explain whether the energy calculated using two differnt reference points are the same or different.
- Review A Bookmark Stewart, Justin Physics: Unit 3- Energy / 1 of 4/ Activity 1 Task: Potential & Kinetic Energy Activity 1 of 5 At what point in this roller coaster does the roller coaster have the most gravitational potential energy? A roller coaster starts from rest at point A. The mass of the cart with O A. Point A riders is 900 kg. The motor of the roller coaster does work to get the car up the hill to point B. From point B, the car relies on energy transformations to make it through the rest of the shown portions of the roller coaster. [g=9.8 m/s²] B. Point B C. Point C O D. Point D AWhen your hands are cold, you can rub them together to warm them. Explain the energy transformations that make this possible.Two balls having different masses reach the same height when shot into the air from the ground. If there is no air drag, which of the following statements must be true? (More than one statement may be true.) A. Both balls left the ground with the same speed. B. Both balls left the ground with the same kinetic energy. C. Both balls will have the same gravitational potential energy at the highest point. D. The heavier ball must have left the ground with a greater speed than the lighter ball. E. Both balls have no acceleration at their highest point.
- Question 8 This graph shows different types of energy for a roller coaster car that starts at the top of a large hill and goes down to its lowest point at 6 s. Energy of a Roller Coaster Car 500 450 400 According to the graph, what is the most likely relationship between height and potential energy? 350 3 300 S 250 200 150 100 50 10 Time (s) - Mechanical Energy ...... Potential Energy Kinetic Energy Your answer: O They are directly related. O They are inversely related. O There is no relationship between the two. O There is not enough information for a conclusion.Please asapDetermine the energy lost, due to friction, as an 8000 N car that skids to a stop, if its initial velocity was 12 m/s.