Asked by Joe

Newton's cradle is a contraption where metal balls hang from a frame. When one ball is pulled and released, the collision causes one ball on the opposite end to be released. Which type of force can decrease the total momentum of this system ? (1 point) electrostatic force magnetic force friction force strong nuclear force
Answered by Joe
Are you sure?
Answered by Joe
One object is traveling northeast with a momentum of 12 kg-m/s, while a second object is traveling southwest on the same path as the first object with a momentum of 4 kg-m/ s. When the two objects collide, they stick together . What is the momentum after their collision ? (1 point) 16 kg-m/ s southwest 8 kg-m/s northeast 8 kg-m/s southwest 16 kg-m/s northeast
Answered by Joe
Two identical merry -go -rounds are loaded up with equal amounts of mass . On merry -go -round A , the mass is placed in the center , while the mass is placed near the edges of merry -go -round B. The merry - go-rounds are pushed with equal forces , and merry -go-round A ends up moving with a greater angular velocity . Which statement helps explain this difference ? (1 point ) Merry -go -round A has a greater moment of inertia .
Merry -go -round A has more inertia .
Merry -go - round B has a greater moment of inertia .
Merry -go - round B has more inertia .
Answered by Joe
In a closed system, an object with a mass of 10 kg moves at a velocity of 5.4m / s . It collides with a second object that has a mass of 12 kg and that is moving in the opposite direction with a velocity of 3.5m / s . What is the total momentum of the system after the collision ? (1 point) 42kg - m / s; 12kg - m / s O54 54kg - m / s; 66kg - m / s
Answered by Joe
In a closed system , an object with a mass of 10 kg moves at a velocity of 5.4 m / s . It collides with a second object that has a mass of 12 kg and that is moving in the opposite direction with a velocity of 3.5 m / s . What is the total momentum of the system after the collision ? ( 1 point ) 42 kg - m / s
12 kg - m / s
54 kg - m / s
66 kg - m / s
Answered by Joe
A force of 30 N is applied to a ball, and it takes the ball 1.5 seconds to travel 4 meters. What is the work done on the ball? (1 point) 120 J
80 J
180 J
45 J
Answered by Joe
Are you sure?
Answered by Joe
Based on the mass and speed data, which object will have the greatest amount of kinetic energy ? 5 kg moving at 2m / s 10 kg moving at 5m / s kg moving at 2m / s 10 kg moving at 2m / s
Answered by Joe
A rock with 50 kg of mass is sitting on the ground . A rock with 5 kg of mass falls from a cliff above it. Compare the values of kinetic energy for the two objects at different times . (1 point ) The small rock may start with more kinetic energy , but will lose kinetic energy as it falls . The small rock has more kinetic energy than the large rock as soon as it begins to move . The kinetic energy of the small rock will sometimes be greater or smaller than the large rock . The large rock will always have more kinetic energy , regardless of speed .
Answered by Joe
Are you 100% sure?
There are no AI answers yet. The ability to request AI answers is coming soon!