You and a friend are playing tug-of-war with a massless rope. You are pulling with 50 Newtons of force while your friend is pull
1 answer:
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Answer:
15 N
Explanation:
The magnetic force on a piece of current-carrying wire is given by:
where
I is the current in the wire
L is the length of the piece of wire
B is the magnetic field strength
is the angle between the direction of B and I
In this problem:
I = 10 A
B = 0.3 T
L = 5 m
Substituting into the equation, we find
Answer:
(a) 4.83 m/s to the left
(b) 1224 J
Explanation:
Using the law of conservation, the initial momentum equals the final momentum. Taking left as positive while right as negative then
momentum, p=mv where m is mass and v is velocity
After the collision, the canoe keep their same masses
m and v represent mass and velocity respectively, the subscripts 1 and 2 are the initial velocities and masses while subscripts 3 and 4 are final velocities
Substituting for 16 Kg,
for 4 Kg,
for 12 m/s,
for -6 m/s since it's towards right and we already mentioned that right is negative,
for 22.7 m/s then
hence direction is to the left
(b)
We know that kinetic energy is given by and by substituting the given values of mass and velocity, in this case not considering direction then we add the values of the two objects in question, and get the total before, and add the values of the two objects after and get the total after
Kinetic energy before collision=KE=
Kinetic energy after collision=KE=
The two values of KE before and after collision are almost equal hence we conclude that energy is conserved.