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A lumberjack (mass = 99.7 kg) is standing at rest on one end of a floating log (mass = 246 kg) that is also at rest. The lumberjack runs to the other end of the log, attaining a velocity of +4.74 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 relative to the shore) just before the lumberjack jumps off?
(b) Determine the velocity of the second log (again relative to the shore) if the lumberjack comes to rest relative to the second log.
A crate that weighs 20 Newton starts from rest and slides down a rough 5.0 meter long ramp, inclined at 25o with the horizontal. Evaluate the speed of the crate at the bottom of the ramp
A car traveling at a speed of 55 has its brakes applied at A, reducing speed at a rate of (-t/4) mph/s where t is in seconds. Find cars speed and acceleration
In the Rutherford scattering experiment, 3.30 MeV alpha particles (4He nuclei containing 2 protons and 2 neutrons) scatter off lead nuclei (containing 82 protons and 126 neutrons). Determine the maximum force exerted on the alpha particle
An 8 kilogram bullet is shot into a 4 kilogram block, at rest on a frictionless horizontal surface. Determine the initial velocity of the bullet is closes to
Several children are on a sled pulled by a four-wheeler across a level snow-covered field. determine the work done on the sled by the tension in the rope in 10.0 s
A place kicker should kick a football from a point 34 m (about 37 yd) from the goal, and the ball should clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground by a speed of 26 m/s at an angle of 45 degrees to the horizonta..
Determine what is the thinnest soap film that will strongly reflect yellow light with a wave length of 589 nanometers
At an amusement park there is a ride in which cylindrically shaped chambers spin around a central axis. What is the radius of the chamber
A cannonball shot with the initial velocity of 129 m/s at an angle of 36° follows a parabolic path and hits a balloon at the top of its trajectory. Neglect air resistance, how fast is the cannonball going as it hits the balloon.
A 2 ton automobile moving with a speed of 60 mph collides with a 10 ton truck at an intersection. find the velocity of the two after the collision
The maximum strain of a steel wire with Young's modulus 2.0 x 10^11 N/m^2, just before breaking, is 0.20%. What is the stress at its breaking point
What is the kinetic energy of a carbon atom moving with a speed of 500 m/s.
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