Physics Work,Power & Energy Level: High School
Explain the difference between energy and power and how they are related to work . Give example of each
Physics Force & Laws Of Motion Level: High School
Using the principle of momentum conservation , explain what happens when a moving billiard ball collides with a stationary ball (cue ball hitting the eight ball) .
Physics Force & Laws Of Motion Level: High School
Define the term impulse .
Physics Force & Laws Of Motion Level: High School
The only force acting on a 1.6 kg body as it moves along the x-axis is given in the figure at “click here” . If the velocity of the body at x = 2 m is 5.0 m/s , What is its kinetic energy at x = 6.0 m ?
Physics Force & Laws Of Motion Level: High School
The horizontal surface on which an object slides is frictionless . If F = 6.0 N and M = 1.0 kg , What is the magnitude of the force exerted on the large black by the small block .
Physics Force & Laws Of Motion Level: High School
If theta is 50 degrees and the Tension in the string 2 is 40.3 N , determine the mass of the block .
Physics Force & Laws Of Motion Level: High School
In the figure shown at ‘click here’ , the coefficient of kinetic friction between the block and the incline is .4 what is the magnitude of the acceleration of the suspended block as it falls . Disregard any pulley mass or friction in the pulley .
Physics Work,Power & Energy Level: High School
A skier weighing .8kN comes down a frictionless ski run that is circular (R = 30 m) at the bottom as shown in the figure at “click here” . If her speed is 12.0 m/s at point A , What is her speed at point B .
Physics Work,Power & Energy Level: High School
A force F = (3.00 N) i +(7.00 N) j + (7.00 N ) k acts on a 2.00 kg mobile object that moves from an initial position of di = (3.00 m) i – (2.00 m) j + (5.00 m) k to a final position of df = -(5.00 m) I + (4.00 m) j + (7.00 m) k in 4.00 s . Find(a) The work done on the object by the force in the 4.00 s interval
(b) The average power due to the force during that interval(c) The angle between vectors di and df .
Physics Work,Power & Energy Level: High School
A 0.30 kg ladle sliding on a horizontal frictionless surface is attached to one end of a horizontal spring (k = 500 N/m)_ whose other end is fixed . The ladle has a kinetic energy of 10 J as it passes through its equilibrium position (the point at which the spring force is zero).(a) At what rate is the spring doing work on the ladle as the ladle passes through its equilibrium position .
(b) At what rate is the spring doing work on the ladle when the spring is compressed 0.10 m and the ladle is moving away the equilibrium position ?
Physics Work,Power & Energy Level: High School
The loaded cab of an elevator has a mass of 3.0 x 10^3 kg and moves 210 m up the shaft in 23 s at constant speed . At what average rate does the force from the cable do work on the cab ?
Physics Work,Power & Energy Level: High School
A force F = (cx – 3.00 x^2)I acts on a particle as the particle moves along an x axis , with F in newtons , x in meters , and c a constant . At x = 0, the particles kinetic energy is 20.0 J: at x = 3.00 m , it is 11.0 J , Find c .
Physics Work,Power & Energy Level: High School
A 5.0 kg block moves in a straight line on a horizontal frictionless surface under the influence of a force that varies with position . How much work is done by the force as the block moves from the origin to x = 8.0 m, and (f) x = 9.0 m .
Physics Work,Power & Energy Level: High School
A spring and block are in the arrangement . When the block is pulled out to x = +4.0 cm, we must apply a force of magnitude 360 N to hold it there, We pull the block to x = 11 cm and then release it. How much work does the spring do on the block when the block moves from x1 = +5.0 cm to(a) x = +3.0 cm,
(b) x = -3.0 cm
(c) x = -5.0 cm
(d) x = -9.0 cm
Physics Kinematics Level: High School
Distinguish between speed , velocity and acceleration . Explain the quantities in terms of falling objects ?