Velma bicycles northward at an unchanging speed of 4 m/s, and Mort jogs southward at an unchanging speed of 4 m/s. Are Velma and Mort in relative motion?
A) No, because they both have the same speed.
B) No, because they both have the same velocity.
C) No, because neither Mort nor Velma is accelerated.
D) Yes, because they have different velocities.
E) Yes, because they have different speeds.
D
You might also like to view...
Air flows through a 1 cm diameter tube at 8 m/s. The air is at 40ºC and the tube is 100ºC. If the tube is 3.5 m long determine, a) the entrance length for developed flow and b) heat transfer to the air.
What will be an ideal response?
Two objects, A and B, are rubbed together. As a result, object A acquires an excess negative charge while object B becomes positively charged. In comparison to their masses before the charging process, you can say that
A) the mass of both objects increased. B) the mass of A increased and that of B decreased. C) the mass of A decreased and that of B increased. D) the mass of both objects decreased. E) None of the other choices is correct.
An alpha particle has a mass of 6.64 × 10-27 kg and a charge of 3.20 × 10-19 C, and it is traveling at 0.9650c
(c = 3.00 × 108 m/s), 1 eV = 1.60 × 10-19 J) (a) What is its rest energy (in GeV)? (b) What is its total energy (in GeV)? (c) What is its kinetic energy (in GeV)?
Which man exerts greater pressure against the floor?
1) a 150-kg man lying on the floor 2) a 150-kg man standing on the floor 3) Both men exert the same pressure. The reason is that 4) both men have the same weight. 5) the upright man's weight is distributed over a smaller area. 6) the man lying down has his weight equally distributed.