Velocity differs from speed in that velocity indicates a particle's __________ of motion.
1 answer:
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Answer:
0.6 m/s
Explanation:
Let the raft speed be v.
Given:
Mass of the swimmer (m) = 75 kg
Mass of the raft (M) = 500 kg
Speed of swimmer after leaving the raft (u) = 4 m/s
Now, the given situation can be considered a problem of conservation of total momentum before and after collision.
Momentum is the product of mass and velocity.
Here, the swimmer and raft are the bodies in collision.
So, before the collision, both the bodies were at rest. So, initial momentum is 0. Now, from conservation of momentum, the final momentum of the system must be 0 after the collision. Therefore,
Final Momentum = 0
Plug in the given values and solve for 'v'. This gives,
The final velocity of the raft is -0.6 m/s. Now, speed is the magnitude of velocity.
Therefore, the corresponding raft speed is 0.6 m/s.
Answer:
404K
Explanation:
Data given, Kinetic Energy.K.E=8.37*10^-21J
Note: as the temperature of a is increase, the rate of random movement will increase, hence leading to more collision per unit time. Hence we can say that the relationship between the kinetic energy and the temperature is a direct variation.
This relationship can be expressed as
where K is a constant of value 1.38*10^-23
Hence if we substitute the values, we arrive at
converting to degree we have