# What is the kinetic energy of a #15 kg# object moving at #3 m/s#?

Kinetic energy ( *K* ) = 67.5 joule

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The kinetic energy of a 15 kg object moving at 3 m/s is 67.5 joules.

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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.

- An object with a mass of #1 kg# is hanging from an axle with a radius of #16 m#. If the wheel attached to the axle has a radius of #88 m#, how much force must be applied to the wheel to keep the object from falling?
- A box on the floor with a mass of 2 kg is under the effect of forces F1, F2 and F3 as it shows below. If the box moved a distance of 3 m. Calculate the work done on the box? HELP please.
- If an object with a mass of #5 kg # changes speed from #3m/s# to #16 m/s#, by how much does its kinetic energy change?
- If a #12 kg# object is constantly accelerated from #0m/s# to #40 m/s# over 18 s, how much power musy be applied at #t=1 #?
- A balanced lever has two weights on it, one with mass #2 kg# and one with mass #16 kg#. If the first weight is # 8 m# from the fulcrum, how far is the second weight from the fulcrum?

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