A car is decelerating at the rate of 2 km/s2. If its initial speed is 66 km/s, how long will it take the car to come to a complete stop?
A. 33 s.
B. 330 s.
C. 3.3 s.
D. 132 s.
Answer: A
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At t = 0, a particle is located at x = 25 m and has a velocity of 15 m/s in the positive x direction. The acceleration of the particle varies with time as shown in the diagram. What is the velocity of the particle at t = 5.0 s?
?
?
A. +15 m/s B. ?15 m/s C. +30 m/s D. 0 E. ?1.2 m/s
At t = 0 the switch S is closed with the capacitor uncharged. If C = 30 ?F, ? = 50 V, and R = 10 k?, what is the potential difference across the capacitor when I = 2.0 mA?
A. 20 V B. 15 V C. 25 V D. 30 V E. 45 V
The electromagnetic force is the force that holds nuclei together
Indicate whether the statement is true or false
Captain Rickard orders his starship to accelerate from rest at a rate of "1g" (accel = 9.8 m/s2). How long does it take the starship to reach one-tenth the speed of light if light travels 300. megameters/s?
What will be an ideal response?