Remember to include given information, basic equations, calculations, and solutions with correct units for full credit. You are NOT to use kinematics unless otherwise stated. Captain Marvel races through the atmosphere with a speed of 200. m/s on her way to Wakanda to help the cause. If she requires 1,450 N of force in order to travel at this constant speed, a. how much power does she expend? b. If she slows to a stop and her mass is 65.0 kg, how far did she travel when stopping if she used the same force as above?

Remember to include given information, basic equations, calculations, and solutions with correct units for full credit. You are NOT to use kinematics unless otherwise stated. Captain Marvel races through the atmosphere with a speed of 200. m/s on her way to Wakanda to help the cause. If she requires 1,450 N of force in order to travel at this constant speed, a. how much power does she expend? b. If she slows to a stop and her mass is 65.0 kg, how far did she travel when stopping if she used the same force as above?

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter7: Work And Kinetic Energy

Section: Chapter Questions

Problem 75P: (a) How long would it take a 1.50105kg airplane with engines that produce 100 MW of power to reach a...

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(a) How long would it take a 1.50105kg airplane with engines that produce 100 MW of power to reach a speed of 250 m’s and an altitude of 12.0 km if air resistance were negligible? (b) If it actually takes 900 s, what is the power? (c) Given this power, what is the average force of air resistance if the airplane takes 1200 s? (Hint: You must find the distance the plane travels in 1200 s assuming constant acceleration.)
Remember to include given information, basic equations, calculations, and solutions with correct units for full credit. You are NOT to use kinematics unless otherwise stated. Captain America (100. kg) lunges vertically into the air, leaving the ground at 25.0 m/s and comes to a stop midair. a. How much work is done on him by gravity? b. Using the work–energy theorem, to what height did he reach?
Remember to include given information, basic equations, calculations, and solutions with correct units for full credit. You are NOT to use kinematics unless otherwise stated. Black Panther (90.0 kg) is running along the ground and then must quickly slide to a stop after traveling at a speed of 15.0 m/s. Using the Work–Energy Theorem, a. Determine the coefficient of kinetic friction between his feet and the ground if he slides 24.0 m. b. How much power is done by the net force? You will need to use a kinematic equation to find time prior to completing this part.
Remember to include given information, basic equations, calculations, and solutions with correct units for full credit. You are NOT to use kinematics unless otherwise stated. In order to catch Ronan by surprise, Groot throws Rocket (8.50 kg) at an angle of 30.0° above the horizontal. If Groot’s arm moves through a horizontal distance of 1.75 m in the process of applying the force at the given angle, a. How much work does Groot do on Rocket if he uses a force of 1200. N to throw him? b. What speed does Rocket reach if he started from rest and the total work was created by Groot alone? c. What would be Rocket’s total range if he followed a parabolic path after release, ending at the same height from which he was thrown?
You want to analyze the motion of an object moving in one dimension under a non zero net force. What are some of the differences between using Newton's second law and using the Work‑Energy theorem to analyze this object's motion? Mark all that apply. A. Newton's Second Law provides a more precise way of determining the object's speed. B. By using the Work‑Energy theorem, we can determine the object's speed directly as a function of its position. C. The Work‑Energy theorem provides a more precise way of determining the object's speed. D. By using Newton's Second Law, we can determine the object's position and speed separately as a function of time.
A. Suppose you lift a 15 kg box by a height of 1.0 m. How much work do you do in lifting the box? Express your answer using two significant figures. B. Instead of lifting the box straight up, suppose you push it up a 1.0-m-high ramp that makes a 30 ∘ degree angle with the horizontal, as shown in (Figure 1). Being clever, you choose a ramp with no friction. How much force is required to push the box straight up the slope at a constant speed? Express your answer using two significant figures. C. How long is the ramp? Express your answer using two significant figures. D. Use your force and distance results to calculate the work you do in pushing the box up the ramp. Express your answer using two significant figures.
01: Suppose a force F proportional to Energy; Velocity; and time. Find the formula of the force equation using dimensional analysis. 02: chose the correct answer: (show your answer) A. How much time will be required to perform 520 J of work at the rate of 0.027 hp? (a) 24s (c) 20 s (d) 26 s (b) 16s B. A students caries a bag weighing 11.025 lbm from the ground floor to his class on the first floor that is 78.74 in high. The work done by the boy is (a) 1 J (c) 100 J (d) 1000 J (b) 10 J C. The potential energy of a system increases, if work is done (a) by the system against a conservative force (b) by the system against a non-conservative force (c) upon the system by a conservative force (d) upon the system by a non-conservative force
An object that measured a mass of 0.89 kg started moving at a speed of 3.89 m/s. After some time, the speed increased to 6.25 m/s. What was the kinetic energy when the object reached the higher speed? b. What was the net work done by the object?
* 00 A skateboarder at a skate park rides along the path shown in the following figure. If the speed of the skateboarder at point A is v = 1.5 m/s, what is her speed at point B? The skateboarder's mass is 20 kg. Assume that friction is negligible. a A. 5.5 m B. 1.8 m B. 1) List the number and associate it with a symbol. Please include unit. Symbol Number Information at point A Information at point B MacBook Pro G Search or type URL %2$ ) 4. R
27. You push with a force of 400 N and use 200 W of power to push a box across a rough floor at steady speed. a. How much force is needed to push the box twice as fast? Explain. b. How much power would you need to push the box twice as fast?
A learner with a mass of 60kg runs up a flight of stairs in 5 seconds.The height of the stairs is 300cm.a. Is work a vector or scalar quantity?b. Calculate the work done by the learner.
For exercise, an athlete lifts a barbell that weighs 400 N from the ground to a height of 2.20 m at a constant speed in a time of 1.60 s. A. What is the output energy, in kJ (kiloJoules)? B. What is the output power, in kW (kiloWatts)?