Physics B-Day (Ashmore) 2020-21 by Mr. Ashmore Live Session 6 Questions 4
5
6
20
You are speeding your 1800 kg truck down Ferguson on a Friday night at 29 m/s. You see a squirrel in the road
and slam on the brakes to avoid hitting it. The brakes plus the road friction generate 5000 N of force on the car,
How far will your car skid before it stops? Do you hit the squirrel if you were 100 m away when you started
braking?
W =
= KE
W = Fd
KE =
mu?

Una carga puntual de 3 x 10-6 c se coloca a 12 cm de una segunda carga puntual de - 1,5 x 10-6 c. calcular la magnitud fuerza eléctrica entre las cargas

Arefrigerator uses r-134a as the working fluid and operates on the ideal vapor-compression refrigeration cycle except for the compression process. the refrigerant enters the evaporator at 120 kpa with a quality of 34 percent and leaves the compressor at 70°c. if the compressor consumes 450 w of power, determine (a) the mass flow rate of the refrigerant, (b) the condenser pressure, and (c) the cop of the refrigerator. (0.00644 kg/s, 800 kpa, 2.03)

Engines for propeller-driven aircraft are limited in their maximum rotational speed by the fact that the tip speed of the propeller must not approach the speed of sound in air (mach i). taking 6 ft as a typical diameter for a propeller of a light airplane and 1100 fils as the speed of sound, find the upper limit on the rpm (revolutions per minute) of the propeller shaft.