In which situation will the friction between an object and the surface on which it is moving be decreased? a. the object is pushed over a longer distance b. the weight of the moving object is decreased c. the object is pushed with greater force against the surface d. the surface on which the object is moving is made smoother put answers in the comments of actual answers, as i need them! lots of points! 63 points

Aknife blade is a(n) a. lever b. screw c. wedge d. inclined plane

Awater balloon launcher uses an elastic band with a spring constant of 115 n/m to use thee launcher you stretch thee band back with a balloon n it the water balloons have a mass of 1.3 kg a) if you stretch the band by 0.8 m, what elastic force will the band exert? b) with the band stretched 0.8 m, how much elastic potential energy is stored in the spring? c) if you release the band, it pushes forward. what is the kinetic energy of the balloon when it reaches the natural length of the band? d) what is the speed of the balloon when it reaches the natural length of the band?

Aplayer uses a hockey stick to push a puck at a constant velocity across the ice. the weight of the puck is 170 n. the coefficient of friction is 0.0600. with what force must the player push the puck so that his force just equals the frictional force? 28.3 n 0.999 n 0.102 n 0.0104 n