When the life preserver is dropped from the helicopter, the only force acting on the object is the gravitational force. This modifies the equations of motion. Thus, the working equation is written below:
h = vt + 0.5gt²
where
v is the initial velocity
g is the acceleration due to gravity equal to 9.81 m/s²
h is the height of the fall
h = (1.46 m/s)(1.8 s) + 0.5(9.81 m/s²)(1.8 s)
h = 11.457 m
Explanation:
The measure of average kinetic energy of particles or molecules of a substance is known as temperature.
When we increase the temperature of a substance then its molecules tend to gain kinetic energy because of which these molecules collide with each other. Hence, they move away from each other leading to change in the state of matter.
This means that increase in temperature changes solid into liquid and liquid into gas.
Thus, we can conclude that the temperature of a material is a measure of the average kinetic (motion) energy of the molecules in the material. As the temperature increases, a solid turns into a gas when the particles are moving fast enough to break free of the chemical bonds that held them together.
Answer:
v = 75 m / 15 s = 5 m/s
Explanation:
Speed is equal to the distance traveled divided by the time.
v = d / t
When you shoot a basketball at a basket, the energy from your hands is transferred into the basketball. When you hold the ball up in preparation to shoot, it has potential energy, meaning that it has stored energy that can turn into kinetic energy. When you shoot it, that potential energy turns into kinetic energy, causing the basketball to move.
Leonna has a solid, Xiao has a liquid, Blake made a mistake, and Amir has a gas.
