Abody of mass 33kg makes an elastic collision with another body at rest and continues to move in the original direction but with 1/7 of its original speed (a) What is the mass of the other body? (b) What is the speed of thetwo-body center of mass if the initial speed of the 3.3kg body was 6.5 m/s? la) Number Units (b) Number Units

A toy car of mass 0.08 kg, gets into an elastic collision with a toy train mass 0.49 kg. If the train is at rest and the car is moving at 1 m/s initially. How fast is the train moving after the collision? A Moving to another question will save this response. in

a cheetah jumps straight up in the air to catch a bird (with a mass of 100g )at the peak of its jump. if the vird is  moving with a speed of 6.9 m/s when the cheetah catches it and the cheetah and bird move together at 0.20m/s after the cath, what is the mass of the cheetah?

A truck with a mass of 1570 kg and moving with a speed of 17.5 m/s rear-ends a 652 kg car stopped at an intersection. The collision is approximately elastic since the car is in neutral, the brakes are off, the metal bumpers line up well and do not get damaged. (a) Calculate the initial momentum of the truck (in kg m/s). kg m/s (b) Calculate the final velocities (in m/s) for the truck and the car. Vf = m/s Vf = m/s (c) Calculate the total momentum (in kg m/s) of the truck AND the car after the collision. kg m/s (d) Did you expect the results that you got for Part (a) and (c)? O No, since kinetic energy may not be conserved. O Yes, since the collision is inelastic. O No, since there were no forces acting on either the car or the truck during the collision. O Yes, since momentum is conserved in a collision with no external forces acting on the colliding objects.

A truck with a mass of 1480 kg and moving with a speed of 17.0 m/s rear-ends a 732 kg car stopped at an intersection. The collision is approximately elastic since the car is in neutral, the brakes are off, the metal bumpers line up well and do not get damaged. (a) Calculate the initial momentum of the truck (in kg m/s).  kg m/s (b) Calculate the final velocities (in m/s) for the truck and the car. vtf= m/svcf= m/s (c) Calculate the total momentum (in kg m/s) of the truck AND the car after the collision.  kg m/s (d) Did you expect the results that you got for Part (a) and (c)? Yes, since the collision is inelastic. No, since there were no forces acting on either the car or the truck during the collision.      Yes, since momentum is conserved in a collision with no external forces acting on the colliding objects. No, since kinetic energy may not be conserved.

2. Conservation of Linear Momentum See Figure 2. Block 1 of mass m₁ slides from rest along a frictionless ramp from an unknown heighth and then collides with stationary block 2, which has mass m₂ = 3m₁ . The collision is an elastic one. After the collision, block 2 slides into a friction-filled region where the coefficient of kinetic friction is 0.5 and comes to a stop through a distance d = 10 m in that region. (a) What is the height h? (ANSWER: h = 20 m) (b) What is the velocity of block 1 just after the collision? (ANSWER: (-)10 m/s) (If the collision were instead, completely inelastic (that is, the objects stick together, what is the height h?)