An automobile manufacturer claims that its product will, starting from rest, travel 0.40 km in 9.0 s. What is the magnitude of the constant acceleration required to do this?
A. 9.9 m/s2
B. 8.9 m/s2
C. 6.6 m/s2
D. 5.6 m/s2
E. 4.6 m/s2
Answer: A
You might also like to view...
The stimulated emission of photons from the excited atoms in a gas laser is prompted by which of the following?
a. nearby presence of photons of same wavelength as those emitted b. high flux of electrons c. high voltage d. high temperature
A pool ball moving at 3 m/s collides head-on with an identical pool ball that's initially at rest. Just after the collision, the second ball moves away at 2 m/s while the first ball
A) moves at 3 m/s in a direction opposite to the second ball. B) continues moving at 3 m/s in the same direction. C) is at rest. D) moves at 1 m/s in the same direction as the second ball. E) moves at 1 m/s in a direction opposite to the second ball.
A proton moving at 6.0 × 10^4 m/s is projected at an angle of 30° above a horizontal plane. If an electric field of 400 N/C is acting down, how long does it take the proton to return to the horizontal plane? (Hint: Ignore gravity. mproton = 1.67 × 10^-27 kg, qproton = 1.6 × 10^-19 C)
a. 7.8 × 10^-6 s c. 7.8 × 10^-7 s b. 1.6 × 10^-6 s d. 3.9 × 10^-6 s
A zero decibel sound level
a. has zero amplitude c. is just at the threshold of hearing. b. is nonsense d. none of the above