Arunner begins to sprint along a 100 meter track. when he passes the 10 meter mark his trainer beings timing him. the runner passes the 80 meter mark at 4.32 seconds. what is the runners speed?

Many machines- including inclined planes such as ramps- increase the strength of the force put into the machine but decrease the distance over which the force is applied.

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

When considering gravity acceleration and the force of acceleration, what must be true? a. the direction of acceleration must be perpendicular to the direction of the force. b. the direction of the force and the direction of acceleration must be the same as each other. c. the direction of the force and the direction of acceleration must be opposite of each other. d. the mass of the body must be the same as the acceleration of the body.