physics
posted by steve .
what is the formula to calculate the following:
how much force is needed to move a 10 pound block 10 feet in 8 seconds>

Assuming there is no friction, proceed as follows.
The mass of the block is
M = W/g = 10/32.2 = 0.3106 slugs
Mass must be measured in slugs if you want the force in pounds, using Newton's second law.
The final velocity will have to be
2*10 ft/8 s = 2.5 ft/s to move 10 feet in 8 seconds. (The average velocity is half that, 1.25 ft/s)
The acceleration is
a = (2.5 ft/s)/8s = 0.3125 ft/s^2
Now use F = M a, with the mass M in slugs.
F = 0.097 pounds force
Look at it this way: You are accelerating the mass at about 1/100 g, so you need a force equal to only about 1/100 of the weight.
Respond to this Question
Similar Questions

Re: Physics/Math
A 17 N horizontal force F pushes a block weighing 6.0 N against a vertical wall. The coefficient of static friction between the wall and the block is 0.68, and the coefficient of kinetic friction is 0.48. Assume that the block is not … 
math
How much force is needed to accelerate a 50kg rider and her 250kg motorcycle at 5 m/s2? 
Physics/Force
building a device to shoote a plastic hockey puck with a lever (think pinball) attached to a bungie cord. How much force is needed to propel a plasic hockey puck 30 feet or 40 feet or 50 feet  what formula should I use? 
physics
A 10.0kg block is at rest on a horizontal floor. If you push horizontally on the 10.0kg block with a force of 20.0 N, it just starts to move. (a) What is the coefficient of static friction? 
physics
A 5.0kg block is at rest on a horizontal floor. If you push horizontally on the 5.0kg block with a force of 10.0 N, it just starts to move. (a) What is the coefficient of static friction? 
physics PLEASE help
A 5.0kg block is at rest on a horizontal floor. If you push horizontally on the 5.0kg block with a force of 10.0 N, it just starts to move. (a) What is the coefficient of static friction? 
physics please !
A 3.0kg block sits on top of a 5.0kg block which is on a horizontal surface. The 5.0kg block is pulled to the right with a force as shown in the figure . The coefficient of static friction between all surfaces is 0.65 and the kinetic … 
Physics
A block (weight= 10kg) is sitting on a surface with friction (coefficient= 0.5). A force (push) is applied to the end of the block, 35 degrees below the horizontal. Calculate the magnitude of the force to move the block. 
Physics
A block whose weight is 34.0 N rests on a horizontal table. A horizontal force of 27.2 N is applied to the block. The coefficients of static and kinetic friction are 0.600 and 0.472, respectively. Will the block move under the influence … 
Physics
A 2.8 kg block is pushed a distance D = 9.8 meters at a constant velocity by a force F = 46 N at an angle A = 30. It takes 8.1 seconds to move the block. Friction can be ignored. What is the work done on the block by the force?