If we decrease the time it takes for a car to travel over the same distance, this will

a).decrease the speed.
b).decrease the velocity.
c).increase the speed.
d).have no effect on velocity or speed.

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27

80cm/s.

24cm/s.

53.3cm/s.