An 8.0-g bullet is shot into a 4.0-kg block, at rest on a fr…

An 8.0-g bullet is shot into a 4.0-kg block, at rest on a frictionless horizontal surface (see the figure). The bullet remains lodged in the block. The block moves into an ideal massless spring and compresses it by 8.7 cm. The spring constant of the spring is 2400 N/m. qq.jpg What is the potential energy stored in the spring after the spring is compressed by 8.7 cm?

block rests on an inclined as shown in figure,  angle of the…

block rests on an inclined as shown in figure,  angle of the slope is θ. The Force F is applied so that the block just starts (barely) moving upward. Answer the following Question. A1 and A2 as well as F1 and F2 are the component of Force A and Force F. Q PIC.png The weight of the object   and the friction force on  the object is represented by