physical science
posted by Anonymous .
A 0.50 kg block initially at rest on a frictionless horizontal surface is acted upon by a force of 8.0 N for a distance of 7.5 m. What is the velocity of the block in m/s?

If the movement is in the direction of the force,
KEblock=workputin
1/2 m v^2=8N*7.5m
solve for v 
A 150L water heater is rated at 8 kW. If 20 percent of its heat escapes, how long does the heater take to raise the temperature of 150 L of water from 10 oC to 60 oC?
Respond to this Question
Similar Questions

PHYSICAL SCIENCE
A 0.50KG BLOCK INITIANALLY ON A REST ON A FRICTIONLESS HORIZONTAL SURFACE IS ACTED UPON BY A FORCE OF 8.0N FOR A DISTANCE OF 4.0M. HOW MUCH KINETIC ENERGY DOES THE BLOCK GAIN? 
physics
A 5.0kg block at rest on a frictionless surface is acted on by forces F1 = 5.5 N and F2 = 3.5 N. What additional horizontal force will keep the block at rest? 
physics
A physics student pulls a block of mass m = 23 kg up an incline at a slow constant velocity for a distance of d = 4 m. The incline makes an angle q = 25° with the horizontal. The coefficient of kinetic friction between the block and … 
physics
A 1.16 kg block and a 2.32 kg block are initially at rest on a frictionless, horizontal surface, with a compressed spring of negligible mass between them. When the blocks are released, they move off in opposite directions. If the final … 
physics
If a 0.50kg block initially at rest on a frictionless, horizontal surface is acted upon by a force of 5.7 N for a distance of 8.6 m, then what would be the block's velocity? 
Physics Mechanics
A 2.30 kg block is acted upon by a horizontal force F(x) = 30.0  10.0x where the force is measured in Newtons if x is measured in meters. The coefficient of kinetic friction between the block and the flat surface is 0.170. The block … 
physical science
A 0.5 kg block initially at rest on a frictionless, horizontal surface is acted upon by a force of 5.0 N for a distance of 4.0 m. How much kinetic energy does the block gain? 
Physics
If a 0.50kg block initially at rest on a frictionless, horizontal surface is acted upon by a force of 8.0 N for a distance of 4 m, then what would be the block's velocity? 
physics
If a 0.50kg block initially at rest on a frictionless, horizontal surface is acted upon by a force of 7.6 N for a distance of 8.6 m, then what would be the block's velocity 
Physics
A 0.60kg block initially at rest on a frictionless, horizontal surface is acted upon by a force of 9.0 N for a distance of 2.0 m. How much farther would the force have to act for the block to have 72 J of kinetic energy?