In the pulley system shown below, a 360 N weight is slowly lifted. Assuming the system is 100% efficient and each pulley is weightless, what is the minimum input force needed to lift the weight? Rope Pile L = 16.74m

A. 61 N

B. 121 N

C. 181 N

D. 361 N

A dart is thrown at some speed v at 45° above the horizontal, with the aim of hitting the bull's eye of a dartboard located 2.5 m away.

A gasoline engine transform approximately 34 percent of the fuel's chemical energy into mechanical energy. if energy is conserved what happenes to the other 66 percent?

Match each type of wave to the particle motion it causes. 1. transverse wave A. particles move perpendicular to wave motion 2. longitudinal wave B. particles move parallel to wave motion 3. circular wave C.

What is true of transverse waves? a. Surface waves are transverse waves only. c. An example of transverse waves is sound waves. b. Transverse waves vibrate parallel to the direction d. Transverse waves travel through a medium. of the wave's motion.

What are examples of scalar and vector quantity?

The second harmonic of a guitar string has a frequency of 120 hz. what is the length of the guitar string if the speed of the waves on the string is 110 m/s?

Which of the following processes is NOT a chemical change? A burning candles B cooking an egg C grilling a steak D mowing grass

In the diagrams, the solid green line represents Earth's rotational axis and the dashed red line represents the magnetic field axis. Which diagram accurately shows Earth's magnetic field?

In order for natural selection to occur, Charles Darwin stated we must begin with a population of organisms that has genetic A) competition. B) engineering. C) reproduction. D) variation.

How fast must a 6 kg cat run to have kinetic energy of 150 j?