The 100 kg block in the figure takes 3.4s to reach the floor after being released from rest.

What is the mass of the block on the left?

Question

The 100 kg block in the figure takes 3.4s to reach the floor after being released from rest.

What is the mass of the block on the left?

nottim · Answer

anonymous · Answer

Okay, so you've learned about Potential Energy and Kinetic Energy, correct?

anonymous · Answer

$$1/2mv^2=KE$$
$$mgh=PE$$

nottim · Answer

Yeah, but not in this course.

raffle_snaffle · Answer

You will carry those formulas throughout the physics serious XD

nottim · Answer

No, like for some reason, my university course is behind my high school physics.

anonymous · Answer

I'm fairly certain you just set 1/2mv^2=mgh , plugging in the 100 kg on the side that's for KE and solve for m. I could be wrong.

nottim · Answer

anyway to solve that using just kinematics and f=ma?

anonymous · Answer

Are you asking to just used kinematics and f=ma to solve the problem?

nottim · Answer

yeah.

nottim · Answer

They want to make my life difficult

anonymous · Answer

Go for it, seems good. Lol, I get what you're saying.

nottim · Answer

Anything appreciated. But kinematics specifically if one could.