Homework Help: Physics

Posted by Stephanie on Sunday, January 30, 2011 at 9:44pm.

Both block A and B mass 3kg and are initially 2m above the ground. They slide down a smooth ramp and then across a rough surface with a speed of 4m/s. How much energy did the block lose due to the friction along the rough surface? AND is transformed into what form of energy?

Physics - drwls, Monday, January 31, 2011 at 12:01am
It makes no difference what the mass is or that there are two of them.

When falling H = 2m, if there were no friction the speed would be sqrt(2gH) = 6.26 m/s, but the speed achieveed is only 4 m/s.

(4/6.26)^2 = 41% is the fraction of
energy remaining .
59% is converted to heat.

Answer this Question

Related Questions

physics - A 1.9- block slides down a frictionless ramp, as shown in the figure. ...
physics - A 1.9 kg block slides down a frictionless ramp, as shown in figure 8-...
physics - A 2.7 kg block, starting from rest, slides down a ramp with friction. ...
Physics - A 10 kg block is allowed to slide down a ramp with uk = 0.15. a. What ...
physics - A 3.3-kilogram block sliding down a ramp from a height of 4.5 meters ...
Physics - A 4.2-kilogram block sliding down a ramp from a height of 4.5 meters ...
PHYSICS! - A 3.6-kilogram block sliding down a ramp from a height of 4.6 meters ...
Physics - A 3.6-kilogram block sliding down a ramp from a height of 4.6 meters ...
Physics - A 3.9-kilogram block sliding down a ramp from a height of 5.2 meters ...
physics - A 20 kg mass is allowed to accelerate down a frictionless 15° ramp...

For Further Reading

First Name:
School Subject:
Answer: