A truck with a mass of 400 kg is moving down the highway at a constant speed. When the driver sees a red light, the brakes are used to slow down at an acceleration of −0.7 m/s2. Using the equation F = ma, what force must the brakes exert for the truck to slow at that rate? Round your answer to the nearest whole number.

The brakes must exert a force of

Suppose you have a box. which of these is not necessarily a true statement regarding the relationship between the force applied to the box, the work done on the box, and the distance the box is moved? a. if the box is not moved, no force is being applied to the box. b. if no force is applied to the box, no work is done on the box. c. if work is done on the box, then a force is applied to the box. d. if work is done on the box, then the box is moved a distance.