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
Mashutka [201]
3 years ago
13

What two things must you know to find the momentum of an object? :( anyone?

Physics
2 answers:
Mandarinka [93]3 years ago
7 0
<em>Linear Momentum is a vector quantity.</em>
<em>       p = mass * Velocity</em>
<em>We need to know the mass, and velocity (magnitude and direction)</em>


miss Akunina [59]3 years ago
4 0
You will need too know the mass and velocity
You might be interested in
The speed of light in a vacuum is 299,792,458 m/s. Which gives this number in three significant digits? 299,000,000. m/s 2.99 x
dexar [7]

Answer: 2.99(10)^{-8} m/s

Explanation:

When a number is written in scientific notation (representing the number using powers of base ten) it is expressed so that it contains a digit in the place of the units and all other digits after the decimal point, multiplied by the respective exponent.  

Then, the significant figures (or significant digits) will be the digits that are before the power of ten.  

Now, in the case of the number 299,792,458 if we want to write it with three significant digits, we have to write it in scientific notation as:

2.99(10)^{-8}

7 0
3 years ago
Read 2 more answers
The turnbuckle is tightened until the tension in the cable AB equals 2.3 kN. Determine the vector expression for the tension T a
brilliants [131]

Answer:

a) 0.83984 i + 0.41992 j - 2.0996 k KN

b) T_ac = 1.972888 KN

Explanation:

Given:

- The tension in cable AB = 2.3 KN

Find:

a) Determine the vector expression for the tension T as a force acting on member AD.

b) Also find the magnitude of the projection of T along the line AC.

Solution:

part a)

- Find unit vector AB:

                            vector (AB) = 2 i + j - 5 k

                             mag (AB) = sqrt (2^2 + 1^2 + 5^2)

                             mag (AB) = sqrt(30)

                             unit (AB) =  ( 1 / sqrt(30) )* ( 2 i + j - 5 k )

- Find Tension vector:

                             vector (T) = unit(AB)* 2.3 KN

                                              = 0.83984 i + 0.41992 j - 2.0996 k

- The projection of T onto AC can be found from the dot product of vector T to unit vector (AC)

- For unit vector (AC)

                               vector (AC) = 2 i - 2 j - 5 k

                               mag (AC) = sqrt (2^2 + 2^2 + 5^2)

                               mag (AC) = sqrt(33)

                               unit (AC) =  ( 1 / sqrt(33) )* ( 2 i - 2 j - 5 k )

- Compute the projection:

                                T_ac = vector T . unit (AC)

T_ac = (0.83984 i + 0.41992 j - 2.0996 k)  . ( 1 / sqrt(33) )* ( 2 i - 2 j - 5 k )

                                T_ac = 0.2923947572 - 0.146973786 - 1.827467232

                                T_ac = 1.972888 KN

4 0
3 years ago
Gravitational potential energy is often released by burning substances. true or false
jolli1 [7]
Gravitational potential energy is caused when an object is resting above the ground. It is released when the object is falling, not by burning substances.
4 0
3 years ago
Read 2 more answers
Four rivers have the same volume of water flow over time but fall from the different heights to power hydroelectric dams. which
sveticcg [70]

Answer:

I thibknits 175

Explanation: It's the furthest

3 0
1 year ago
Which unit is equivalent to J/s?<br> O A. Meters<br> O B. Watts<br> O C. Newtons<br> O D. Calories
xxMikexx [17]
Watts, or one Joule per second
5 0
2 years ago
Read 2 more answers
Other questions:
  • A hockey player uses her hockey stick to exert a force of 6.81 N on a stationary hockey puck. The hockey puck has a mass of 165
    6·1 answer
  • When a solo eclipse occurs. It is seen in
    9·1 answer
  • A certain simple pendulum has a period on the earth of 2.00 s . part a what is its period on the surface of mars, where g=3.71m/
    10·1 answer
  • A car weighing 10.7 kN and traveling at 13.6 m/s without negative lift attempts to round an unbanked curve with a radius of 64.0
    6·1 answer
  • The ears are ____ and ____ to the shoulders and ____ to the nose.
    9·2 answers
  • The shorter the wavelength of a photon, the greater its energy. We can see photons with wavelengths between 700 nanometers (red)
    11·1 answer
  • Suppose a wheel with a tire mounted on it is rotating at the constant rate of 2.23 2.23 times a second. A tack is stuck in the t
    15·1 answer
  • a ball is thrown down at 25 m/s from a 500m tall building. how fast is it traveling when it hits the ground?
    12·1 answer
  • What are action-reaction force pairs?
    6·2 answers
  • Chapter Name :- Vector
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!