Physics Force & Laws Of Motion Level: High School
Conservation of linear momentum
A 60 kg skater initially at rest pushes a 70 kg skater and gives her a velocity of 4 m/s away from him . What is the velocity of the 60 kg skater ?
Physics Force & Laws Of Motion Level: High School
While on an elevator , Jaden’s apparent weight is 550 N, When he is in ground , the scale reading is 633 N . What is Jaden’s acceleration while on the elevator ? (Take the y axis point upward )
Physics Force & Laws Of Motion Level: High School
Conservation of momentum
A 1500 kg cannon fires a shell having mass 30 kg , to the right with a velocity of 70 m/s .a. What is the velocity of the cannon ?
b. Assume a stationary cannon , Suppose the cannon shell charge has a total explosive contact time of 0.01 seconds . What is the impulse Force applied to the shell ?
Physics Force & Laws Of Motion Level: High School
Collision
A 0.5 kg cue ball with velocity 10 m/s strikes a stationary 8 kg bowling ball, head –on and imparts all of its forward momentum at impact .a. What is the velocity of the bowling ball assuming a perfectly elastic collision ?
b. Suppose the cue ball were replaced by a clay ball . What is the velocity of the combined mass assuming a completely inelastic collision ?
c. If K E is not conserved in inelastic collision where does all the energy go ?
Physics Force & Laws Of Motion Level: High School
A place kicker contacts a 0.35 kg football for delta t = 0.03 seconds .a. If a speed of 5 m/s is imparted to the ball , find the resulting impulse.
b. What is the magnitude for the impulse force ?
Physics Force & Laws Of Motion Level: High School
A 100 g ball on a 60 cm long string in swung in a vertical circle about a point 200 cm above the floor . The string suddenly breaks when it is parallel to the ground and the ball is moving upward . The ball reaches a height 600 cm above the floor ?What was the tension in the string an instant before it broke ?
Physics Force & Laws Of Motion Level: High School
Find the expression for the magnitude of the horizontal force F for which m1 dies not slip either up or down along the wedge . All surface are frictionless .
Physics Force & Laws Of Motion Level: High School
A helicopter is to lift a 592 kg magnesium frame at a construction site , as shown in the figure at “click here” . As the helicopter accelerates upward at 0.165 g , What is the magnitude of the tension FT in the cord ?
Physics Force & Laws Of Motion Level: High School
Suppose the pulley in the figure at “click here” is suspended by a cord C . m1= 1.05 kg and m2 = 3.29 kg .Determine the tension in this cord after the mass is released and before it hits the ground . Ignore the mass of the pulley .
Physics Force & Laws Of Motion Level: High School
Three blocks of mass 12.8 kg each , on a frictionless horizontal surface are in contact with each other as shown in the figure at “click here”(a) A force F = 92.0 N is applied to block 1 (mass m1) Determine the acceleration of the system
(b) Calculate the net force on each block
.(c) Calculate the force of contact that block m1 , exerts on m2 .
(d) Calculate the force of contact that block m2 exerts on m3
Physics Force & Laws Of Motion Level: High School
If the block starts from rest 10.1 m up the plane from its base , what will be the block’s speed when it reaches the bottom of the incline ?
Physics Force & Laws Of Motion Level: High School
The block shown in the figure “click here” has mass m = 6.17 kg and lies on a smooth frictionless plane titled at an angle e = 23.8 degree to the horizontal . Determine the acceleration of the block as it slides down the plane .
Physics Force & Laws Of Motion Level: High School
(a)310 kg helicopter accelerates upward at 0.530 m/s^2 while lifting a 1230 kg car . What is the force exerted by the air on the rotors ?(b)What is the tension in the cable (ignore its mass) that connects the car to the helicopter ?
Physics Force & Laws Of Motion Level: High School
How long does it take an automobile traveling in the jett lane at 60.0 km/h to pull alongside a car traveling in the same direction in the right lane at 40.0 km/h if the car’s front bumpers are initially 100 m apart ?
Physics Force & Laws Of Motion Level: High School
A women at an airport is towing her 20.0 kg suitcase at constant speed by pulling on a strap at an angle theta above the horizontal . She pulls on the strap with a 35.0 N force , and the friction force on the suitcase is 20.0 N . Draw a free-body diagram of the suitcase .(a) What angle does the strap make with the horizontal ?
(b) What normal force does the ground exert on the suitcase ?
