5. A vector A of magnitude 5 V3 units, another vector B of magnitude 10 units are inclined to each other at an angle of 30°. The magnitude of vector product of the two vectors is
(a) 5 V3 units
(b) 10 units
(c) 25 v3 units
(d) 75 units
ing
ns.

it has to be b, about 97 percent.

gravitational energy

electrical energy

kinetic energy

ligh energy

b

explanation:

answer: the potential energy decreases from 379 j to 243 j

explanation:

for the law of conservation of energy, the total energy in a system must be conserved. the total energy of the system is given by the sum of kinetic (k) and potential (u) energy:

e = k + u

the total energy is e=675 j, and this does not change.

initially, the kinetic energy is k=296 j, so the potential energy is

at the end, the kinetic energy is k=432 j, so the potential energy is

so, we see that the potential energy has decreased from 379 j to 243 j.