kg rugby player running east withn a speed of 4.00 m/s tackles a 99.0-kg opponent running north withn 3.90 m/s. ASsum tackie points toward ch.) (a) What is the velocity of the players immediately after the tackle? magnitude m/s • counterclockwise from the +x axis direction (b) What is the amount of mechanical energy lost during the collision?

blive berritsi od no Tinonas ofl evig dosts hav soml & jobrur conA desto Example H: A 75 kg man throws a 25 kg package at 6.0 m/s from a 100 kg boat. The boat is originally at rest. What is the final speed of the boat?

A 0.900 kg hammer is moving horizontally at 6.50 m/s when it strikes a nail and comes to rest after driving it 1.00 cm into a board. (a) Calculate the duration of the impact in seconds. (b) What was the average force in newtons exerted on the nail? Additional Materials O Reading /1 Points] DETAILS OSCOLPHYS2016 8.2.XP.001. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER When serving a tennis ball, the player hits it when its velocity is zero (at the highest point of a vertical toss). The racket exerts a force of 560 N on the ball for 5.00 ms, giving it a final velocity of 44.0 m/s. Using these data, find the mass (in g) of the balI.

Consider a frictionless track as shown in the figure below. A block of mass m, = 4.40 kg is released from O. It makes a head-on elastic collision at ® with a block of mass m, = 13.5 kg that is initially at rest. Calculate the maximum height to which m, rises after the collision. m (A) 5.00 m

A 0.1 kg ball is thrown with a speed of 20.0ms-1 at an angle of 30.0 degrees with the horizontal. Find the momentum of the ball at its maximum Height

A 3.30-kg steel ball strikes a wall with a speed of 11.0 m/s at an angle of 0 = 60.0° with the surface. It bounces off with the same speed and angle (see figure below). If the ball is in contact with the wall for 0.200 s, what is the average force exerted by the wall on the ball? (Assume right and up are the positive directions.) Fx N Fy y

Two masses m1 = 7 kg and m2 = 14 kg undergo an elastic collision as shown where θ = 30o. You know that m1 hasan initial speed v1i = 8.6 m/s and you know that m2 has an initial speed v2i = 2.6 m/s before the collision. Calculatethe final speed after the collision v1f for the first mass m1.

Professional Application - A 30,000-kg freight car is coasting at 0.850 m/s with negligible friction under a hopper that dumps 110,000 kg of scrap metal into it. (a) What is the final velocity of the loaded freight car? (b) How much kinetic energy is lost?

A block of mass m slides along a frictionlesssurface with kinetic energy Ki . It collides with ablock of mass 3m that is initially at rest, and thetwo blocks stick together and slide with total kineticenergy Kf . What is the ratio Kf : Ki ?

• A 732-kg car stopped at an intersection is rear-ended by a 1720-kgtruck moving with a speed of 15.5 m>s. If the car was in neutraland its brakes were off, so that the collision is approximately elastic, find the final speed of both vehicles after the collision