Which type of motor uses a brush and commutator to operate?

Which of the following would decrease the mechanical advantage A) a fulcrum B) a fixed pulley C) friction D) heat

when an object is moving there is always a force pushing it in the direction of its motion? true or false? explain

In a series circuit with three bulbs, adding another bulb will a. make the nearest bulb brighter. b. make some of the bulbs dimmer. c. make all the bulbs brighter. d. make all the bulbs dimmer.

A 3.5-kg mass has an initial velocity of 4 m/s. How much force is required to increase the velocity of the mass to 8 m/s in 3?

Describe the difference between velocity and speed?

3. What is the kinetic energy of a 1300 kg car moving at 26.3 m/s?

Kendall has empty graduated cylinder with markings and an identical graduated cylinder partway filled with water. She also has a balance and a marble. Which statement best describes what Kendall can do? A.

2. With regard to the pH scale, a solution with a pH A. higher than 7 is considered an acid. B. lower than 7 is considered basic. C. of 6 is considered neutral. D. close to 14 is considered a strong base.

If a car rolls gently off a vertical cliff, how long does it take to reach 90km/hr.

In the game of volleyball, what skill relates to Newton's second law