A 9.8basketball player runs at a speed of 7m/s
A.what is kinetic energy
B.how much work was done by player to reach his speed starting from rest
A. K.E. = 1/2 * mass * (velocity)^2
B. work and energy are the same thing
... measured in Joules
98x 7 =2,401
A. To calculate the kinetic energy, we can use the formula:
Kinetic Energy = 1/2 * mass * velocity^2
Given that the player is running at a speed of 7 m/s, we need to know the mass of the player to calculate the exact kinetic energy. If you have the mass, you can substitute it into the formula to find the kinetic energy.
B. To calculate the work done by the player to reach his speed starting from rest, we can use the work-energy principle. The work done is equal to the change in kinetic energy.
Work = Change in Kinetic Energy
Since the player starts from rest, the initial kinetic energy is zero. Therefore, the work done by the player to reach his speed is equal to his final kinetic energy. Again, you would need to know the mass of the player to calculate the exact work done.
To answer these questions, we need to use the formulas for kinetic energy and work.
A. Kinetic Energy (KE) is the energy of an object due to its motion. It is calculated using the formula:
KE = 0.5 * mass * velocity^2
In this case, we are given the speed of the basketball player, which is equivalent to the velocity. However, we are not given the mass of the player. So, without the player's mass, we cannot calculate the exact value of kinetic energy.
B. Work (W) is defined as the transfer of energy that occurs when a force is applied to an object, causing it to move. The formula for work is:
W = force * distance * cos(theta)
In this case, we are not given the force applied to the basketball player or the distance traveled. Therefore, we cannot determine the amount of work done by the player to reach his speed starting from rest without this information.
In summary, without the necessary information such as the mass of the player, the force applied, or the distance traveled, we cannot calculate the kinetic energy or the work done by the player accurately.