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
Serhud [2]
3 years ago
15

What from the following list of statements about vectors is definitely true? (section 3.3) The magnitude of a vector can be smal

ler than length of one of its components. Magnitude of a vector is positive if it is directed in +x and negative if is is directed in -X direction. Magnitude of a vector can be zero if only one of components is zero. If vector A has bigger component along x direction than vector B, it immediately means, the vector A has bigger magnitude than vector B. Magnitude of a vector can be zero only if all components of a vector are zero.
Physics
1 answer:
Mashcka [7]3 years ago
6 0

Answer:

"Magnitude of a vector can be zero only if all components of a vector are zero."

Explanation:

"The magnitude of a vector can be smaller than length of one of its components."

Wrong, the magnitude of a vector is at least equal to the length of a component. This is because of the Pythagoras theorem. It can never be smaller.

"Magnitude of a vector is positive if it is directed in +x and negative if is is directed in -X direction."

False. Magnitude of a vector is always positive.

"Magnitude of a vector can be zero if only one of components is zero."

Wrong. For the magnitude of a vector to be zero, all components must be zero.

"If vector A has bigger component along x direction than vector B, it immediately means, the vector A has bigger magnitude than vector B."

Wrong. The magnitude of a vector depends on all components, not only the X component.

"Magnitude of a vector can be zero only if all components of a vector are zero."

True.

You might be interested in
Suppose you are hiking along a trail. Make a comparison between the magnitude of your displacement and your distance traveled. C
Savatey [412]

The magnitude of your displacement is usually less than the distance you travel.

The magnitude of your displacement can be equal to the distance you travel, if you travel in a perfectly straight line.

The magnitude of your displacement can never be greater than the distance you travel.

5 0
3 years ago
A 60.watt light bulb runs for 5.0 seconds. How much energy does it use?
Free_Kalibri [48]

"watt" means "Joule of energy per second"

"60 watts" means "60 Joules per second"

(60 joules per second) x (5 seconds) = <em>300 Joules of energy</em>

3 0
3 years ago
A 0.2 kg baseball moving with a velocity of 20 m/s is struck by a bat. The baseball reverses its direction and moves with a velo
krek1111 [17]

Average force is 666.67 N

<u>Explanation:</u>

Given that :

m = Mass of the baseball = 0.2 kg

u = Initial velocity = 20 m/s  

v = Final velocity = 40 m/s

t = Time taken for change in velocity = 0.006 s

We know:

Force exerted = mass × acceleration = m ×a

Acceleration can be found by means of dividing the change in velocity measured in m/s by the time taken in seconds.

a = $\frac{v-u}{t} = $a = \frac{40-20}{0.006} = 3,333.3 m/s²

Now we have to find the force using the formula, F = mass × acceleration as,

F = 0.2 kg ×3333.3 ms⁻² = 666.67 N

7 0
3 years ago
Please Help Me!!!........​
vesna_86 [32]

Answer:

1.Siddartha Gautama

2.no single founder

3jesus christ

4.muhammad

5.abraham

7 0
3 years ago
You have a mass of 55kg and are riding your frictionless skateboard, which has a mass of 5kg, in a straight line at a speed of 4
Rzqust [24]

Given

m1(mass of the first object): 55 Kg

m2 (mass of the second object): 55 Kg

v1 (velocity of the first object): 4.5 m/s

v2 (velocity of the second object): ?

m3(mass of the object dropped): 2.5 Kg

The law of conservation of momentum states that when two bodies collide with each other, the momentum of the two bodies before the collision is equal to the momentum after the collision. This can be mathemetaically represented as below:

Pa= Pb

Where Pa is the momentum before collision and Pb is the momentum after collision.

Now applying this law for the above problem we get

Momentum before collision= momentum after collision.

Momentum before collision = (m1+m2) x v1 =(55+5)x 4.5 = 270 Kgm/s

Momentum after collision = (m1+m2+m3) x v2 =(55+5+2.5) x v2

Now we know that Momentum before collision= momentum after collision.

Hence we get

270 = 62.5 v2

v2 = 4.32 m/s




7 0
3 years ago
Other questions:
  • Write a hypothesis about how the height of the cylinder affects the temperature of the water. Use the "if . . . then . . . becau
    14·2 answers
  • A permeability test was run on a compacted sample of dirty sandy gravel. The sample was 175 mm long and the diameter of the mold
    12·1 answer
  • If a block of wood has a density of 0.6g/cm3 and a mass of 120g what is the volume
    13·1 answer
  • When a potassium atom forms an ion, it loses one electron. What is the electrical charge of the potassium ion?
    12·2 answers
  • What is the area of the bottom of a tank 30.0 cm long and 15.0 cm wide?​
    5·2 answers
  • How is mechanical advantage determined in a pulley system?
    13·1 answer
  • A light wave has a frequency of <img src="https://tex.z-dn.net/?f=%286%20%5Ctimes%20%7B10%7D%5E%7B8%7D%29." id="TexFormula1" tit
    13·2 answers
  • A 166-g hockey puck is gliding across the ice at 24.5 m/s. A player whacks it with her stick, sending it moving at 39.1 m/s at 4
    6·1 answer
  • Why is Pluto considered less of an oddball planet now?
    9·1 answer
  • A. Draw four rays parallel to the optical axis of your mirror. Two above the optic axis and two below it.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!