John ( body mass= 65 kg) is taking off for a long jump . horizontal accerleration ax is 5m/s^2 and vertical acceleration ay is 0.9 m/s^2. a) calculate the horizontal ground reaction force f g, x .
b) calculate the vertical ground reaction force fg, y.
c) calculate the resultant ground reaction force fg?

In a given chemical reaction, the energy of the products is greater than the energy of the reactants. which statement is true for this reaction?

A3030 cmcm wrench is used to loosen a bolt with a force applied 0.30.3 mm from the bolt. it takes 6060 nn to loosen the bolt when the force is applied perpendicular to the wrench. how much force would it take if the force was applied at a 3030 degree angle from perpendicular? a 3030 cmcm wrench is used to loosen a bolt with a force applied 0.30.3 mm from the bolt. it takes 6060 nn to loosen the bolt when the force is applied perpendicular to the wrench. how much force would it take if the force was applied at a 3030 degree angle from perpendicular?

Aball with a mass of 275 g is dropped from rest, hits the floor and rebounds upward. if the ball hits the floor with a speed of 2.40 m/s and rebounds with a speed of 1.70 m/s, determine the following. (a) magnitude of the change in the ball's momentum (let up be in the positive direction.)