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A blue puck with a mass of 3.60×10?2kg , sliding with a speed of 0.180m/s on a frictionless, horizontal air table, makes a perfectly elastic, head-on collision with a red puck with mass m, initially at rest. After the collision, the velocity of the blue puck is 3.0×10?2m/s in the same direction as its initial velocity.
a) Find the magnitude of the velocity of the red puck after the collision.
b) Find the direction of the velocity of the red puck after the collision.
c) Find the mass m of the red puck.
A railroad car with a mass of 2 x10^4 kg moving at 3.0 m/s collides and joins with 2 railroad cars already joined together, each with the same mass as the single car and initially moving in the same direction at 1.20 m/s.
A boulder has 300J of potential energy sitting on the edge of cliff. What is the boulder's kinetic energy as it hits the ground.
There is evidence that elephants communicate via infrasound, Determine the intensity level of the infrasound 10 km from the source, assuming the sound energy radiates uniformly in all directions
A hockey player strikes a 166 g puck, accelerating it from rest to 48 m/s. If the hockey stick is in contact with the puck for 2.5 ms, what is the average force applied by the stick
A 5.0V potential difference is applied between the ends of a 0.80mm -diameter, 90cm -long nichrome wire, What is the current in the wire
What are vertical and horizontal components of the ball's momentum immediately after striking the crossbar. what is an average acceleration of the ball during this time interval.
Three identical conducting spheres initially have following charges: sphere A, 5Q; sphere B, -7Q; and sphere C, 0. Spheres A and B is fixed in place, with a center-to-center separation that is much larger than the spheres.
State clearly the difference (a) between electric potential and electric field, (b) between electric potential and electric potential energy.
Consider the same situation, but now let the initial speed v_0 of first ball be given and treat the height h of the building as an unknown. What should the height of the building be for both balls to reach the ground at the equivalent time for v_0..
An artillery shell is launched on a flat, horizontal field at an angle of ? = 37.8° with respect to the horizontal and with an initial speed of v0 = 277 m/s. What is the horizontal distance covered by the shell after 9.26 s of flight? What is the ..
The diameters of the main rotor and tail rotor of a single-engine helicopter are 7.69 m and 1.04 m, respectively. The respective rotational speeds are 452 rev/min and 4,140 rev/min. Calculate the speeds of the tips of both rotors
If you weigh 680 on the earth, what would you weigh when at surface of a neutron star that has the same mass as our sun and a diameter of 20km.
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