A 4 kg block slides across a rough horizontal surface for 5 s. At time t = 5 s, it reaches a speed of 12 m/s at the bottom of a quarter-circle ramp of radius 4 m, where it slides with negligible friction. The coefficient of kinetic friction between the block
and the rough horizontal surface is Mo = 0.2. The block then slides along the ramp until the
block is launched vertically upward. A graph of the block's vertical speed as a function of
time after the block leaves the ramp is shown in Figure 2.

The magnitude of the change in speed of the block as it travels across the rough horizontal surface for 5s is most nearly:

A 2m/s
B 10 m/s
C 12 m/s
D 22 m/s

During spring semester at mit, residents of the parallel buildings of the east campus dorms battle one another with large catapults that are made with surgical hose mounted on a window frame. a balloon filled with dyed water is placed in a pouch attached to the hose, which is then stretched through the width of the room. assume that the stretching of the hose obeys hooke's law with a spring constant of 89.0 n/m. if the hose is stretched by 5.80 m and then released, how much work does the force from the hose do on the balloon in the pouch by the time the hose reaches its relaxed length? unitst 3 number-1497 the tolerance is +/-5% open show work click if you would like to show work for this question:

The human body stores chemical energy from digested food. some of the chemical energy is converted into mechanical energy when the body moves. which statement best supported by this information

What are the starting materials for nuclear fission? two small nuclei two large nuclei a neutron and a large nucleus a neutron and a small nucleus