The following shows the forces acting on a box. Explain how you calculate the net force in any direction on the box.

Awheel of mass 48 kg is lifted to a height of 0.8 m. how much gravitational potential energy is added to the wheel? acceleration due to gravity is g = 9.8 m/s2. a. 30.4 j b. 3.1 j c. 297.9 j d. 11,321 j

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?

Ablock of mass m1 = 1.75 kg and a block of mass m2 = 5.75 kg are connected by a massless string over a pulley in the shape of a solid disk having radius r = 0.250 m and mass m = 10.0 kg. the fixed, wedge-shaped ramp makes an angle of ? = 30.0? as shown in the figure. the coefficient of kinetic friction is 0.360 for both blocks. (b) determine the acceleration of the two blocks. (enter the magnitude of the acceleration.)