Answer:
B. right shoe
Explanation:
When the puck comes to a stop after it collides with the left shoe both their velocities becomes zero. This means that their relative velocities is zero as the linear momentum is conserved.
When the puck rebounds after it collides with the right shoe then the right shoe will also move as linear momentum is conserved.
For elastic collision
Hence, the right shoe will have a greater speed after collision.
Answer:
2. the force of the stone's gravity polling up on the Earth
Explanation:
As we apply the force on the stone, the acting gravity on the stone resists as a reaction force. But that also depends upon the angle of force applied. There will be less force required on the horizontal component than vertical relative to gravity. But the force of friction aided by gravity always resists as a reaction force.
A reasonable estimate is 1 x 10^3 feet. By elimination, the first and second can't be since it will yield a negative answer and height can't be negative. Next, the fourth option will yield almost 1800 miles tall which is an impossible height. So the third is the reasonable estimate. Hope it helps.
The distance they covered was 17 Km. Not sure that their displacement was though sorry.