You are pushing a 30-kg wooden crate across the floor. The force of sliding friction on the cate is 90 N. How much force, in newtons, must you exert on the crate to keep it moving with constant velocity?
90 N
3m/s
me gusta comer torta
3m/s
To determine how much force you must exert on the crate to keep it moving with constant velocity, you need to consider Newton's second law of motion. According to this law, the net force acting on an object is equal to the object's mass multiplied by its acceleration. In this case, since the crate is moving with constant velocity, its acceleration is zero.
Here's the step-by-step process to find the force you must exert:
1. Identify the forces acting on the crate: In this scenario, the force of sliding friction is acting on the crate. You need to exert an equal and opposite force to balance the frictional force and keep the crate moving with constant velocity.
2. Determine the magnitude of the frictional force: It is given that the force of sliding friction on the crate is 90 N.
3. Use Newton's second law to find the force you need to exert: The net force acting on the crate in order to maintain a constant velocity is equal to zero since the acceleration is zero. Therefore, you need to exert a force equal in magnitude to the force of sliding friction (90 N), but in the opposite direction.
Hence, you must exert a force of 90 N in the opposite direction of the sliding friction to keep the crate moving with constant velocity.