As shown below, an object with a mass of 5 kg is moving at a speed of 10 m/s. Another object with a mass of 10 kg is moving at a speed of 5 m/s.
Which of the objects has higher kinetic energy?
(1 point)
Responses
The 5 kg object has higher kinetic energy.
The 5 kg object has higher kinetic energy.
Both objects have zero kinetic energy.
Both objects have zero kinetic energy.
The 10 kg object has higher kinetic energy.
The 10 kg object has higher kinetic energy.
The objects have equal kinetic energy.
The objects have equal kinetic energy.
are u sure
Yes, I am sure. Kinetic energy is calculated using the equation KE = 1/2mv^2, where m is the mass of the object and v is the velocity. In this case, the kinetic energy of the 5 kg object can be calculated as KE = 1/2 * 5 kg * (10 m/s)^2 = 250 J. The kinetic energy of the 10 kg object can be calculated as KE = 1/2 * 10 kg * (5 m/s)^2 = 125 J. Therefore, the 5 kg object has higher kinetic energy.
Which statement best describes the relationship between a baseball’s potential and kinetic energy after it is thrown? (assume the ball travels in a straight line)(1 point)
Responses
Potential energy increases, and kinetic energy does not change.
Potential energy increases, and kinetic energy does not change.
Potential energy does not change, and kinetic energy decreases.
Potential energy does not change, and kinetic energy decreases.
Potential and kinetic energy both decrease.
Potential and kinetic energy both decrease.
Potential energy decreases as kinetic energy increases.
Potential energy decreases as kinetic energy increases.
r u sure
To determine which object has higher kinetic energy, we need to use the equation for calculating kinetic energy:
Kinetic energy = (1/2) * mass * velocity^2
Let's calculate the kinetic energy for both objects:
For the 5 kg object:
Kinetic energy = (1/2) * 5 kg * (10 m/s)^2 = 250 J
For the 10 kg object:
Kinetic energy = (1/2) * 10 kg * (5 m/s)^2 = 125 J
Therefore, the 5 kg object has a higher kinetic energy of 250 J compared to the 10 kg object which has a kinetic energy of 125 J. So the correct answer is: The 5 kg object has higher kinetic energy.