For each of the following statements determine whether it is correct or incorrect.

Physics

1 answer:

Mrac [35]3 years ago

7 0

Answer:

a) T; b) F; c) F; d) T; e) T; f) T

Explanation:

a) True, since the equation of work done on a spring is $\frac{kx^2}{2}$

b) False, it will be only mgh.

c) False, since it is $mv^2$ , no direction involved.

d) True, since the measured speed of objects depends from the reference frame of the observer.

e) True, since its formula is $mv^2$ and both terms are positive.

f) True, since the centripetal force the Earth feels, which is the gravitational atraction the Sun exerts, is perpendicular to its circular trajectory.

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1)the magnetic field is strongest near_________of a bar magnet.

horrorfan [7]

1. Is A. at the poles because thats where the magnetic field is going out then coming back into the earth to produce the magnetic field.
2. Again its A. because the compass needle is attracted to " north " which is magnetic south. It does this because opposites attract.
3. This one would be B. Because if the magnets were being repelled the magnetic field lines would look like there was a line that the field hit and bounced off of it.
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7 0

3 years ago

Read 2 more answers

A force vector F1 points due east and has a magnitude of 200N. A second force F2 is added to F1. The resultant of the two vector

PilotLPTM [1.2K]

Answer:

The second vector $\vec{F_2}$ points due West with a magnitude of 600N

Explanation:

The original vector $\vec{F_1}$ points with a magnitude of 200N due east, the Resultant vector $\vec{R}$ points due west (that's how east/west direction can be interpreted, from east to west) with a magnitude of 400N. If we choose East as the positive direction and West as the negative one, we can write the following vectorial equation: