# What is the kinetic energy of an object with a mass of # 15 kg# that has been in freefall for # 7 s#?

Assuming the object was stationary at the beginning of the 7 seconds, its velocity will be

By signing up, you agree to our Terms of Service and Privacy Policy

The kinetic energy of the object is approximately 1,029.45 joules.

By signing up, you agree to our Terms of Service and Privacy Policy

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

- How does work change the energy of an object?
- How much work does it take to lift a #30 kg # weight #3/2 m #?
- A spring with a constant of #4 (kg)/(s^2)# is lying on the ground with one end attached to a wall. An object with a mass of #4 kg # and speed of # 8 m/s# collides with and compresses the spring until it stops moving. How much will the spring compress?
- If a rocket with a mass of #2000# #"tons"# vertically accelerates at a rate of #"14 m/s"^2#, how much power will the rocket have to exert to maintain its acceleration at 7 seconds?
- A balanced lever has two weights on it, the first with mass #5 kg # and the second with mass #7 kg#. If the first weight is # 6 m# from the fulcrum, how far is the second weight from the fulcrum?

- 98% accuracy study help
- Covers math, physics, chemistry, biology, and more
- Step-by-step, in-depth guides
- Readily available 24/7