A car traveling south is 200 kilometers from its starting point after 2 hours. What is the average velocity of the car?
Choose: 100 kilometers/hour south
Answer:
v = 15 [m/s]
Explanation:
To solve this problem we must use the principle of conservation of linear momentum, which tells us that momentum is equal to the product of mass by Velocity.

where:
P = linear momentum [kg*m/s]
m = mass = 2 [kg]
v = velocity = 15 [m/s]
![P=2*15\\P=30 [kg*m/s]](https://tex.z-dn.net/?f=P%3D2%2A15%5C%5CP%3D30%20%5Bkg%2Am%2Fs%5D)
Since we know that momentum is conserved, that is, all momentum is transferred to the second body, we can determine the velocity of the second body, since the mass is equal to that of the first body.
![30=2*v\\v = 30/2\\v = 15 [m/s]](https://tex.z-dn.net/?f=30%3D2%2Av%5C%5Cv%20%3D%2030%2F2%5C%5Cv%20%3D%2015%20%5Bm%2Fs%5D)
The greater the change in velocity, or speed.
Time = (distance covered) / (speed)
Time = (2,000 m) / (330 m/s)
<em>Time = 6.06 seconds</em>
Answer:
(a) 
(b) 1.3927 Nm
Explanation:
We have given that radius 
Current i = 2.34 A
Angle 
Uniform magnetic field B = 12.6 T
Area is given by 
(A) We know that magnetic dipole moment is given by
, here i is current and A is area
So magnetic moment 
(b) We know that torque is given by

So torque experienced by coil will be 