Answer:
B, the car travels around a circular track at 30 m.
Explanation:
Answer:
Some of the kinetic energy from B has been transferred to A
Explanation:
In elastic collision, kinetic energy is conserved. Since A had 0 kinetic energy before the collision, while B has some kinetic energy. And kinetic energy is defined as
As the speed of B decreases post-collision, and its mass stays the same, kinetic energy of B must have been decreased as well.
A gains speed post collision, and so does its kinetic energy. So according to the law of energy conservation, some kinetic energy from B must have been transferred to A.
Answer:
The mass of the beam is = 29 kg.
Explanation:
A beam with mass 40 kg is shown in figure. Point S is the support point. Point B is the middle point on the beam where mass of the beam acts.
Taking moment about Point S
40 × 21 = × 29
= 29 kg
Therefore the mass of the beam is = 29 kg.
A. static ......................