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
denpristay [2]
3 years ago
14

If a ball goes at 20 miles per hour what's the velocity

Physics
1 answer:
stellarik [79]3 years ago
8 0
The velocity is

  (20 miles per hour) in the direction (that the ball is traveling this instant) .

If the speed OR direction of the ball changes, then the velocity has changed.
You might be interested in
B. A 20kg wagon is pulled up a 30° incline at an acceleration of 2.5ms?. The force pulling the wagon is parallel to the incline
yawa3891 [41]

The value of the coefficient of kinetic friction between the wagon and inclined surface is 0.78.

<h3>Coefficient of the kinetic friction</h3>

The value of coefficient of kinetic friction is calculated as follows;

F - Ff = ma

F - μmgcosθ = ma

where;

  • F is applied force
  • μ is coefficient of kinetic friction
  • m is mass of the wagon
  • a is acceleration of the wagon

182 - μ(20 x 9.8 x cos30) = 20(2.5)

182 - 169.74μ = 50

182 - 50 = 169.74μ

132 = 169.74μ

μ = 132/169.74

μ = 0.78

Thus, the value of the coefficient of kinetic friction between the wagon and inclined surface is 0.78.

Learn more about coefficient of friction here: brainly.com/question/20241845

7 0
2 years ago
A woman fires a rifle with barrel length of 0.5400 m. Let (0, 0) be where the 125 g bullet begins to move, and the bullet travel
dybincka [34]

Answer:

Explanation:

Given that,

Length of barrel =0.54m

Mass of bullet=125g=0.125kg

Force extend

F=16,000+10,000x-26,000x²

a. Work done is given as

W= ∫Fdx

W= ∫(16,000+10,000x-26,000x² dx from x=0 to x=0.54m

W=16,000x+10,000x²/2 -26,000x³/3 from x=0 to x=0.54m

W=16,000x+5,000x²- 8666.667x³ from x=0 to x=0.54m

W= 16,000(0.54) + 5000(0.54²) - 8666.667(0.54³) +0+0-0

W=8640+1458-1364.69

W=8733.31J

The workdone by the gas on the bullet is 8733.31J

b. Work done is given as

Work done when the length=1.05m

W= ∫Fdx

W= ∫(16,000+10,000x-26,000x² dx from x=0 to x=1.05m

W=16,000x+10,000x²/2 -26,000x³/3 from x=0 to x=1.05m

W=16,000x+5,000x²- 8666.667x³ from x=0 to x=1.05mm

W= 16,000(1.05) + 5000(1.05²) - 8666.667(1.05³) +0+0-0

W=16800+5512.5-10032.75

W=12,279.75J

The workdone by the gas on the bullet is 12,279.75J

3 0
3 years ago
PLEASE HELP ASAPPPPPPPPP
Svetlanka [38]
60kg would be the answer
8 0
2 years ago
Which pair of elements has the most similar properties?
Vanyuwa [196]
The answer is B, because oxygen and sulfur are in the same group (group 6A)
7 0
3 years ago
What describes the particles in a liquid
Gnoma [55]

Answer:

liquid a particles slides past pother

Explanation:

mark brainliest :))

8 0
3 years ago
Other questions:
  • Is nuclear fission hybrid physics or geothermal phsics
    15·2 answers
  • Mountain ranges and belts are built through the process called what
    12·1 answer
  • Do these examples represent unbalanced or balanced forces?
    11·1 answer
  • Which is the correct order for these steps in cell signaling?
    13·1 answer
  • JUST PLZ HELP!!! Why does the lightbulb in the right electrical circuit turn on but not the one on the left?
    14·2 answers
  • An electric motor is used to operate a Carnot refrigerator with an interior temperature of 0.00 ◦C. Liquid water at 0.00 ◦C is p
    10·1 answer
  • A 15 kg mass is lifted to a height of 2m. What is gravitational potential energy at this position
    9·2 answers
  • Help on #2 will give brainliest and 40 points
    15·1 answer
  • A basketball rolls down a hill until it comes to a stop in a ditch
    9·2 answers
  • The diagrams show four bodies moving in the directions shown. The only forces acting on the bodies are shown in each diagram.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!