1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Talja [164]
1 year ago
7

If the resultant force acting on a 2.0 kg object is equal to (3.0î + 4.0ĵ) N, what is the change in kinetic energy as the object

moves from (7.0î – 8.0ĵ) m to (11.0î – 5.0ĵ) m?
Physics
1 answer:
12345 [234]1 year ago
3 0

Answer:

ΔK = 24 joules.

Explanation:

ΔK = Work done on the object

Work is equal to the dot product of force supplied and the displacement of the object.

W = F * Δs

Δs can be found by subtracting the vectors (7.0, -8.0) and (11.0, -5.0), which is written as Δs = (11.0 - 7.0, -5.0 - -8.0) which equals (4.0, 3.0).

This gives us

W = < 3, 4 > * < 4, 3 > = (3*4)+(4*3) = 24 J

You might be interested in
In addition to filling lakes with sediment, why is eutrophication a biological concern?
jekas [21]
Aside from filling lakes with sediment, it is a biological concern which is the population of fish and other aquatic organisms will decrease due to the dissolved oxygen in the water decreasing dramatically. I hope my answer has come to your help. God bless and have a nice day ahead!
8 0
3 years ago
How does a seat belt stop your body from moving in a forward motion in a car?
stiks02 [169]
D, when a moving car suddenly stops, your body is still moving forward until the seatbelt stops you.

When things move, there is always friction. It's what makes cars move in the first place. The inside of the car doesn't move, however the wheels on the car are moving at a rapid pace. When the car stops violently, everything inside the car is thrown. The seat belt acts as a safety precaution if an accident happens.

Mark brainliest?
5 0
3 years ago
What is angular frequency​
Firlakuza [10]
Measures angular displacement per unit time.
7 0
3 years ago
Read 2 more answers
If you were to walk at a constant speed 20m/s for 30 seconds, how far would you walk?
lana [24]

Answer:

600m

Explanation:

30×20 at a constant speed is 600m.

6 0
4 years ago
Why is training important?
stira [4]
So you work hard and you do well i’m getting good grades or doing something better.
7 0
3 years ago
Other questions:
  • A light wave moves from a medium where particles of matter are closely packed to a medium made of very little matter. How do you
    6·2 answers
  • A glass of water sitting in direct sunlight evaporates over time. Explain this phase change in terms of the types of heat transf
    13·2 answers
  • Which statement is false regarding seismic waves? HELP FAST
    11·2 answers
  • A measure of the average kinetic energy of the individual particles in an object is called
    14·1 answer
  • What layer of the atmosphere is made mostly of hydrogen and helium?
    8·1 answer
  • An airplane flying horizontally at a constant speed of 350 km/h over level ground releases a bundle of food supplies. Ignore the
    9·1 answer
  • A stuntwoman is going to attempt a jump across a canyon that is 77 m wide. The ramp on the far side of the canyon is 25 m lower
    15·1 answer
  • What is the resultant force acting on an object? The first force is 45 N West and the second is 23 N East.
    6·1 answer
  • Part A
    7·1 answer
  • . The nucleus contains protons and neutrons and the outer part of the atom contains
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!