Physics Force & Laws Of Motion Level: High School
Conservation of momentum
A 137 kg astronaut (including space suit ) acquires a speed of 2.66 m/s by pushing off with his legs from an 1970 kg space capsule . What is the change is speed of the space capsule ?(a) If the push lasts 0.470 s , What is the average force exerted by each on the other ? As the reference frame , use the position of the capsule before the push .
Physics Force & Laws Of Motion Level: High School
Conservation of momentum
An explosion brakes an object into two pieces ,one of which has 1.56 times the mass of the other . If 7890 J were released in the explosion , how much kinetic energy did the heavier piece acquire ?(a) How much kinetic energy did the lighter piece acquire ?
Physics Force & Laws Of Motion Level: High School
Conservation of momentum
A pair of bumper car in an amusement park ride collide elastically as one approaches the other directly from the rear , as seen in the part (a) of the figure which is shown at “click here” . One has a mass of m1 = 458 kg and the other m2 = 555 kg , owing to differences in passenger mass . If the lighter one approaches at v1 = 4.23 m/s and the other is moving at v2 = 3.89 m/s , calculate the velocity of the lighter car after the collision .(a) Calculate the velocity of the heavier car after the collision .
(b) Calculate the change in momentum of the lighter car .
(c) Calculate the change in momentum of the heavier car .
Physics Force & Laws Of Motion Level: High School
A golf ball of mass 0.046 kg is hit off the tee at a speed of 43.4 m/s . The golf club was in contact with the ball for 4.81 x 10^-3 s . Find the impulse impact to the golf ball .(a) Find the average force exerted on the ball by the golf club .
Physics Force & Laws Of Motion Level: High School
Conservation of momentum
A 8700 kg boxcar traveling at 16.8 m/s strikes a second car . The two stick together and move off with a speed of 5.84 m/s . What is the mass of the second car ?
Physics Force & Laws Of Motion Level: High School
Two blocks connected by a string are initially at rest on a table , with coefficient of kinetic friction (Mk) = 0.25 . A force of 10N is now applied to the right-hand block at an angle of 37 degree above the horizontal and a force of 10 N is also applied to the left-hand block at an angle of 37 degree below the horizontal , as shown in the figure at “click here”a. Find the resulting acceleration of blocks .
b. Find the tension in the string connecting the blocks .
c. Find the work done by friction on each block during the first 10 seconds of motion .
d. Find the kinetic energy of the system of two blocks after 10 seconds .
Physics Force & Laws Of Motion Level: High School
A uniform bar of length L and mass m1 = 0.5 kg has a light fixture of mass m2 = 1 kg attached at a distance of L/4 from the right-hand end. The bar is suspended horizontally from three ropes :rope A attached to the wall and rope B and C attached to the ceiling , as shown, Find the tension T in each rope .
Physics Force & Laws Of Motion Level: High School
Block of mass 10 kg is pushed along a rough horizontal surface with coefficient of Kinetic friction u = 0.5 by the applied force 200 N .What is the acceleration of the block ?
If the object moves at a constant speed , What is the value of the applied force ?
Physics Force & Laws Of Motion Level: High School
A horizontal stream of water his a wall at the rate of 45.0 gm/sec . The water has a speed of 4.8 m/sec . Assume the water has zero velocity after it hits .(a) Find the size of the impulse exerted on the wall per unit time (ie , in one second ) . N sec
Find the size of force exerted on the wall .
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 .