Physics Work,Power & Energy Level: Misc Level
As plant engineer, Donna purchases an electrical motor which has an 1500 hp. If it requires 1.20 MW of electricity, what is the efficiency motor?
Physics Waves And Oscillations Level: Misc Level
A simple pendulum, with a 4.4 kg mass and 1 ength 75 cm, is released from rest at an angle of 50 degrees.
(a) To what height does the mass swing on the other side?
(b) what is the speed of the mass at the bottom of the swing?
Physics Work,Power & Energy Level: Misc Level
A spring is characterized by a spring constant of 60 N/m. How much energy does it store, when stretched by 1.0 cm?
Physics Work,Power & Energy Level: Misc Level
A driver, traveling at 22 m/s,slows down her 1500 kg car to stop for a red light. what work is done by the friction force against the wheels?
Physics Kinematics Level: Misc Level
A skier, of mass 60 kg, pushes off the top of a hill with an initial speed of 4.0 m/s.How fast will she be moving after dropping 10 m in elevation?
Physics Force & Laws Of Motion Level: Misc Level
Automobile air bags reduce what during a collision?
a. speed of the automobile
b. the forces exerted upon the passenger
c. the kinetic energy transferred to the passenger
d. the impulse exerted upon the passenger
Mathematics Integration Level: Misc Level
Evaluate the following integral as the limit of sums
Mathematics Integration Level: Misc Level
Evaluate the following integral as the limit of sums
Mathematics Integration Level: Misc Level
Evaluate the following integral as the limit of sums
Mathematics Integration Level: Misc Level
Evaluate the following integral as the limit of sums
Mathematics Integration Level: Misc Level
Evaluate the following integral as the limit of sums
Mathematics Integration Level: Misc Level
Evaluate the following integral as the limit of sums
Physics Kinematics Level: Misc Level
An arrow is shot vertically upward. Three seconds later, it is at a height of 35 m.
a. What was the initial speed of the arrow?
b. How long is the arrow in flight from launch to the initial height? ( Assume the arrow falls vertically downward.)
Physics Kinematics Level: Misc Level
A car with an initial velocity of 3.5 m/s coasts with the engine off and the transmission in neutral. If the combined effect of air resistance and rolling friction causes a constant deceleration of 0.50 m/s2, after how long a time will the car come to a stop?
Physics Kinematics Level: Misc Level
You can determine the speed of the car by measuring the time it takes to travel between mile markers on a highway.
a. How many seconds should elapse between two consecutive mile markers if the car s average speed is 65 mi/hr?
b. What is the car s average speed if it takes 65 s to travel between the mile markers?
