Answers created by Joaquín M.

• Back to user's profile
• Question #a8f56
  
• Question #fa936
  
• Question #106f9
  
• You place a block of wood into a beaker of water and it floats. What can you say about the buoyant force on the block?
  
• An object with a mass of `3 kg` is traveling in a circular path of a radius of `7 m`. If the object's angular velocity changes from `3 Hz` to `9 Hz` in `3 s`, what torque was applied to the object?
  
• The force applied against a moving object travelling on a linear path is given by `F(x)= sinx + 2`. How much work would it take to move the object over `x in [ 0,pi/3]`?
  
• An object with a mass of `2 kg` is traveling at `14 m/s`. If the object is accelerated by a force of `f(x) = x+xe^x` over `x in [0, 9]`, where x is in meters, what is the impulse at `x = 8`?
  
• An object, previously at rest, slides `6 m` down a ramp, with an incline of `(3pi)/8`, and then slides horizontally on the floor for another `3 m`. If the ramp and floor are made of the same material, what is the material's kinetic friction coefficient?
  
• Question #25f42
  
• A baseball is thrown vertically with a velocity of 13 m/s. How high does it go? At what two times is the ball 5 m above the ground?
  
• The force applied on a moving object with a mass of `1 kg` on a linear path is given by `F(x)=2x +3`. How much work would it take to move the object over `x in [1,3]`?
  
• A projectile is shot from the ground at a velocity of `4 m/s` at an angle of `pi/6`. How long will it take for the projectile to land?
  
• A ball with a mass of `2 kg` moving at `14 m/s` hits a still ball with a mass of `21 kg`. If the first ball stops moving, how fast is the second ball moving? How much kinetic energy was lost as heat in the collision?
  
• Question #f66fb
  
• Question #0864e
  
• If a `2 kg` object is constantly accelerated from `0m/s` to `16 m/s` over 6 s, how much power musy be applied at `t=1`?
  
• It took a 500.0-newton ballerina a force of 250 joules to lift herself upward through the air. How high did she jump?