Question

A 0.75 kg teddy bear is nudged off a window sill and falls 2.05 m to the ground. what is its kinetic energy at the instant it hits the ground?

Answer 1

The kinetic energy can be found using the formula Kinetic Energy = 1/2 * mass * velocity^2. To calculate the velocity, use the equation velocity = √(2 * acceleration * distance) and substitute it into the kinetic energy formula.

Step-by-step explanation:

The kinetic energy of an object can be calculated using the formula:

Kinetic Energy = ½ * mass * velocity2

In this case, the mass of the teddy bear is 0.75 kg. The velocity of the bear just before it hits the ground can be calculated using the equation of motion:

velocity = √(2 * acceleration * distance)

Given that the acceleration due to gravity is approximately 9.8 m/s2 and the distance the bear falls is 2.05 m, you can calculate the velocity and then substitute it into the kinetic energy formula to find the answer.

Answer 2

V=6,342 m/s

Step-by-step explanation:

In order to calculate the kinetick energy you need to multiply the speed by the mass of the object, to calculate the final velocity or t the point of impact you use the next formula:

`V^2=2g*h\\v=√(2g*h) \\v=√(2*9,81*2,05)\\ v=√(40,221) \\v=6,342`

So the final velocity when the tedy bear hits the ground is 6,342 m/s.