When the kinetic energy of a body changes with time, what does this change represent? (A)The work done by some force. (C)The work done by some average force. (B)The work done by a net force. (D)The work done by an irregular force.

When the kinetic energy of a body changes with time, what does this change represent? (A)The work done by some force. (C)The work done by some average force. (B)The work done by a net force. (D)The work done by an irregular force.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Related questions

Q: A force of 180N has a rectangular component of 75N acting along a line making an angle of 25degrees…

A: Let force F = 180 N The component of F along a line making an angle of 25 degrees counterclockwise…

Q: If you walk 24 m in a direction exactly 35° west of north and then you walk 11.5 m in a direction…

Q: vector has a magnitude of 72 and a direction of 56°. A second vector has a magnitude of 51 and a…

Q: If C is added to B. the result is -9å + 5ĵ. If B is subtracted from C. the result is 4î – ĵ . Find…

A: C→ + B→ = -9i^ + 5j^ ...(1)C→ - B→ = 4i^ -j^ ...(2)

Q: t (b) Using your previous results, calculate the total flight time, t, in seconds, until the bullet…

A: GivenInitial velocity of bullet V0=79.45 m/s

Q: A vector is 10 units long and points at 30° with respect to the x-axis. How many units does it point…

Q: There are ten steps from the sidewalk up to the front door of a student’s apartment. Each tread is…

Q: Starting from one oasis, a camel walks 25 km in a direction 30° south of west and then walks 30 km…

Q: Problem 3: Find unit vector of a force. Find the unit vector corresponding to a 100 N force at 60°…

Q: Answer B is saying it is wrong.

Q: A bus traveled 60 km north from its terminal. From this point, it traveled 80 km east. How far is…

A: Given: The bus initially travelled 60 km north. The bus travelled 80 km east.

Q: has a magnitude of 149. Which of the following could not

Q: You are walking on a bearing of 32 degrees. You turn right 115 degrees and continue walking forward.…

Q: Eij and k are the usual unit vectors in the x, y and z directions, find aixi c.

A: As we know that i, j and k are unit vectors along the x, y and z directions. These unit vectors are…

Q: You are standing 25.0 feet from a tree that is 45.0 feet tall. What is the distance between you and…

A: We will proceed in the following way:

Q: Vector A has a magnitude of 33.5 units and it points in a direction 335° counterclockwise from the…

Q: A red cross helicopter takes off from headquarters and flies 75 km at 30 degrees south of west.…

Q: A force of 125 N has a rectangular component of 65 N acting along a line making an angle of 20 deg…

A: Magnitude of force = 125 N One of the rectangular component of force = 65 N alonga line making an…

Q: how about if the v= 0.884

Q: Jane leaves her house and walks 5.0 blocks east and then proceeds north until she is 7.8 blocks from…

Q: What is the principal angle of a vector located at 52° South of East?

Q: A two-legged robot is programmed so that upon switching it on, it will do a repetitive pair of…

A: Given: Let the length of each step be l. Total pair of steps is n=1000 Distance covered by robot is…

Q: b) Identify y(t). appropriate solution technique, and solve the differential equation for

Q: A vector in the x-y plane has a magnitude of 45 units with an x- component of magnitude 15 units.…

A: Here, the x component is 15 units The magnitude of the vector is 45 units

Q: A car travels North with a speed of 30 kph and then turns to west at a speed of 15kph. What is the…

A: Given that:- Initial velocity of car=30kph along North

Q: Two force vectors are added together. The vectors are as follows. Vector A is a force of 52 Newton’s…

A: →A = 52(cos62i^ +sin62j^)→A = 24.4i^ + 45.9j^ N→B = 120(cos58i^ +sin58j^)→B = 63.6i^ + 101.77j^ N

Q: The loading ramp at a delivery service is 15 ft long and makes a 19.0° angle with the horizontal. If…

A: First loading ramp delivered service = 15f And make angle = 19°

Q: Please show the solutions answers for number 2

Q: Q.2. Find the magnitude of the resultant force and its direction, measured counter clockwise from…

Q: Vector A has a magnitude of 6 units, vector B has a magnitude of 7 units, A dot B has a value of 14.…

A: Given data The magnitude of vector A is given as A=6 units. The magnitude of the vector B is given…

Q: Given vector A = and vector B = , what is A dot B?

A: Given A = <10, 20, 18> B = <16, -17, -24>

Q: In a time of 2.86 h, a bird flies a distance of 83.7 km in the direction of 32.9 degrees East of…

A: The objective of the question is to find the x component of the bird's average velocity. The bird's…

Q: A sniper atop a building 150m high fired a bullet parallel to the horizontal with a speed of…

A: Time=5.53 s

Q: Vector A has a magnitude of 10 units and makes an angle of 30 degrees counterclockwise from the…

Q: The four force are acting at a point as shown in the figure. Determine the resultant in magnitude…

Q: From a starting point, you started walking 3 kms west then 4kms north. What is your distance…

A: Answer:- Given Distance (S1) = 3 kms Distance (S2) = 4 kms Total distance travelled(S) = ? We…

Q: A man goes 20m due west and then 15m due north . How far is he from the starting point.

Q: A child walking in a field makes three consecutive displacements. The child first moves 6.25 m…

Q: A vector has a magnitude of 2.8 m and points in a direction that is 135° counterclockwise from the z…

Q: A car drives 100km East and then 80.0 km North. What is the displacement of the car?

Q: The pilot of a private plane flies 20.0 km in direction 60° north of east, then 30.0 km straight…

A: Consider the figure,

Question

Question number 18

A)0. 58
(B)0.43
(C)0.34
(D)0.16
18) When the kinetic energy of a body changes with time, what does this change represent?
(A)The work done by some force.
(C)The work done by some average force.
(B)The work done by a net force.
(D)The work done by an irregular force.
19) A mass m has a velocity v at a position x, what will be the work done if the distance traveled is
quadrupled?
(A) % my?
(B)my?
(C3/2 my?

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.

Similar questions

A student leaving school walks 46 km north and then walks 15 km south. If north is considered positive and south is considered negative, what is the student's displacement?
Draw direction vectors in unit cells for the following cubic directions: a) [1 -2 3] b) [1 0 -3]
The force P of magnitude 50 KN is acting at 215° from the x-axis. Find the components of P in u 157° from x, and v negative 69°from x. (Draw the Figure)
A Red Cross helicopter takes off from headquarters and flies 115 km in the direction 195° from North.It drops off some relief supplies, then flies 135 km at 350° from North to pick up three medics.If the helicoper then heads directly back to headquarters, find the distance and direction (rounded to one decimal place) it should fly. The direction should be in degrees from north.
Can you please solve numbers 3 and 4
9
A fox leaves its den and travels 575 yeards west, then 475 yards northwest. In what direction must the fox travel to head directly back to its den? Round your answer to the nearest hundreth. Enter N for North, E for East, W for West, and S for South.
A hiker goes 6 km, 67 degrees east of north then changes direction and goes 5 km, 34 degrees west of north. How far is he from the starting point?
Sarah rode her motorcycle and went 125 kilometers north in a day. And the next day, she went another 2 kilometers south. Find Sarah's totak displacement and distance after two days.
What unit vector is in the same direction as v = 2i - 4j?
An airplane flies 59 km at 30.0° east of north before turning to go 58 km due south and then finally, it flies 100 km at 30.0° north of west. How far is the plane from its starting point?
On a certain mountain, the elevation z above a point (x,y) in an xy-plane at sea level is z = 2000 −0.02x2−0.04y2, where x, y, and z are in meters. The positive x-axis points east, and the positive y-axis north. Stephie is at the point (20,5,1991). (a) If Stephie uses a compass reading to walk northeast, will she ascend or descend? At what rate?