Correct answer is A
Voltaic Piles
Answer:
w = 73 N
Explanation:
Since the box is held by the ropes it means that the resulting tension is equal to the weight of the box
T_res = w
Now, the resulting tension is a combination of the tension of each rope.
Since we want to find the vertical component we must multiply by the cosine of 30 degrees the value of T
T_res = T*cos(30) + T*cos(30)
T_res = 2*(42 N)*(0.866)
T_res = 72.746 N
T_res = w = 72.746 N
Answer:
Equation of motion
Explanation:
this equation is known as the second equation of motion and it is used to calculate the distance travelled (s) by a body in time (t), the body having initial velocity (u) and acceleration (a). This equation has four values in it, so if any three values are known, the fourth value can be calculated.
Answer:
a. 2.959kgm/s
b. 7.63kgm/s
Explanation:
We were given Mass= 0.25kg
Velocity = 13m/s
Angle = 46°
a) Along the x axis we have =
0- 0.25(13)cos(46°) = (- 2.26)i kgm/s
Along the y axis we have =
-0.25(20) +0.25(13)sin(46°) = (-1.91)j kgm/s
Magnitude of change in momentum
=√ i²+ j²
= √ (-2.26)²+ ( -1.91)²
= √8.7557
= 2.959 kgm/s
b.
Along the x axis
-0.25(20) - 0.25(13)cos(46°) = (-7.26)i kgm/s
Along the y axis
0 + 0.25(13)sin(46°) = (-2.34)j kgm/s
Magnitude of change in momentum
= √ i²+ j²
= √( -7.26)² + (-2.34)²
= √58.1832
= 7.63kgm/s
Answer:
Explanation:
An object’s mass will remain constant throughout the universe, but its WEIGHT can change from planet to planet.
If you increase the mass of a planet, what happens to its gravity?
If the radius does not change, Then its gravity increases.
If the gravity on a planet decreases, what happens to the weight of an object on that planet? Weight decreases.
