#1. According to the conversion between Fahrenheit and Celsius, which one between is incorrect?
#2. A 0.25 Kg ball is attached to the end of a 0.5 m string and moved in a horizontal circle at 2.0 m/s What net force is need to keep the ball in its circle path?
#3. A rocket is fired at angle 30 above the horizontal axis, The initial speed is 22 m/s. Find the maximum height that the ball attains?
#4. A uniform, 250 N pipe is used as a lever. Where must be the fulcrum be placed from 600 N. If a 600 N weight at one end and is to balance a 150 N weight at the other end? (The length of pipe is 2 m)
#5. A force applied to a 50 kg box on a level floor is just enough to start it moving. The coefficients of static and kinetic friction are respectively 0.5 and 0.3. If the same force continues to applied to the box, its will have an acceleration of approximately?
#6. A 2500-kg truck crashes into a wall at 2.5 m/s and comes to stop in 0.5 s. What is the average force on the truck?
#7. A stone is thrown from the roof of a 30-m-tall building with a speed of 15 m/s. what is the speed of the stone when it hits the ground?
#8. A baseball (m=0.14 kg) has an initial velocity -38 m/s and the ball depart from the bat with final velocity 58 m/s. The contact time between the bat and ball is 4 x 10 s. Find the average force exerted on the ball by the bat.
#9. What is the wavelength of the FM radio frequency of 100 Mhz?
#10. From circuit below. What is the equivalent resistance?