For each of the following statements determine whether it is correct or incorrect.
1 answer:
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
b) False, it will be only mgh.
c) False, since it is , 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 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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Answer:
The correct answer is
a) 1, 2, 3
Explanation:
In rolling down an inclined plane, the potential energy is Transferred to both linear and rotational kinetic energy thus
PE = KE or mgh = 1/2×m×v² + 1/2×I×ω²
The transformation equation fom potential to kinetic energy is =
m×g×h =
=
=
=
Therefore the order is with increasing rotational kinetic energy hence
the first is the sphere 1 followed by the disc 2 then the hoop 3
the correct order is a, 1, 2, 3