using conservation of momentum
m1 v1 = (m1 + m2l v
90* 5 = ( 90 + 90) v
v = 2.5 m/s
=======
Comment before rate in case any doubt, will reply for sure.. goodluck
Larry has a mass of 90 kg and runs across in front of the classroom at...
A woman with a mass of 53 kg runs at a speed of 6 m/s and jumps into a giant 30 kg skateboard initially at rest. What is the combined speed for the woman and the skateboard?
A lumberjack (mass = 98 kg) is standing at rest on one end of a floating log (mass = 275 kg) that is also at rest. The lumberjack runs to the other end of the log, attaining a velocity of +3.5 m/s relative to the shore, and then hops onto an identical floating log that is initially at rest. Neglect any friction and resistance between the logs and the water. (a) What is the velocity of the first log just...
A lumberjack (mass = 94.4 kg) is standing at rest on one end of a floating log (mass = 279 kg) that is also at rest. The lumberjack runs to the other end of the log, attaining a velocity of +2.64 m/s relative to the shore, and then hops onto an identical floating log that is initially at rest. Neglect any friction and resistance between the logs and the water. (a) What is the velocity of the first log (again...
A girl of mass 54.0 kg jumps off the bow of a 88.0-kg canoe that is initially at rest. If her velocity is 2.70 m/s to the right, what is the speed of the canoe after she jumps
A child of mass 23 kg runs with a speed of 2.13 m/s tangentially toward the edge of a merry-go-round. The merry-go-round has a radius 2.33 m and a moment of inertia of 278 kg m2. She jumps on the merry-go-round, and it starts rotating. (a) What is the girl's angular momentum relative to the axle of the merry-go-round before she jumps on it? (b) How fast (angular speed) does the merry-go-round spin after she jumps on it?
4) Bubba pulls two boxes across the floor of his barn. One box has a mass (m1) of 20.4 kg and has a coefficient of kinetic friction of 0.321 with respect to the floor. The second box has a mass (m2) of 23.1 kg and a coefficient of kinetic friction of 0.177 with respect to the floor. The two boxes are connected with a rope. Bubba pulls on another rope connected to the second box. All of the ropes are...
A car with mass MC = 1.26 x 103 kg runs into the back of a truck with mass MT = 3.23 x 103 kg that is initially at rest. Immediately after the collision, the car is moving with a speed of 1.09 m/s and the truck is moving with a speed of 3.29 m/s, both in the direction the car was initially traveling. What is the total kinetic energy lost in the collision? (Of course, the change in energy...
A lumberjack (mass = 98 kg) is standing at rest on one end of a floating log (mass = 215 kg) that is also at rest. The lumberjack runs to the other end of the log, attaining a velocity of +4.0 m/s relative to the shore, and then hops onto an identical floating log that is initially at rest. Neglect any friction and resistance between the logs and the water. (a) What is the velocity of the first log just...
A lumberjack (mass = 98 kg) is standing at rest on one end of a floating log (mass = 260 kg) that is also at rest. The lumberjack runs to the other end of the log, attaining a velocity of +3.5 m/s relative to the shore, and then hops onto an identical floating log that is initially at rest. Neglect any friction and resistance between the logs and the water. (a) What is the velocity of the first log just before the lumberjack jumps...
2*. A person wants to push a lamp (mass 8.0 kg) across the floor. The coefficient of friction be tween the lamp and the floor is k = 0.15. Cal- culate the maximum height x above the floor at which the person can push the lamp so that the lamp slides at constant speed rather than tips. The base of the lamp is a circle of radius 0.12 m. The lamp's center of gravity is directly above the center of...