Q6.26 1/1 point (graded) A physics textbook claims that a mouse would not get hurt if it fell off the roof of a high skyscraper. Calculate its maximum falling speed. Remember that its maximum speed occurs when the mouse is no longer accelerating. As physicists, we tend to simplify things, so we will model our mouse as a small rectangle of dimensions 6.0 cm x 3.5 cm and mass 24 g. Assume that the drag coefficient for the furry mouse is Cp - 0.64. Use g = 9.80 3 Enter your answer in [m/s]. 17.01 17.01 v GQ7.1 10/10 points (graded) Consider the system of two blocks connected by a string. The blocks are initially held at rest; then they are released. Assume that there is no friction between the block and the surface or in the pulley. mg m a) Draw and label the free-body diagram for the block m1 immediately after it is released. b) Is the kinetic energy increasing (AK > 0), decreasing (AK < 0) or unchanged (AK = 0)? Is the work done on the block m1 by each force positive, negative, or zero? Wprwoity : V Zero Wnormalforce Zero V V Wiersion: Positive V Positive v V ??: Positive V V
F m2 c) Assume now that the block is pushed with a force F so that it is moving to the left with increasing speed. Draw and label the free-body diagram for the cart. Assume that the cart has negligible rolling friction. d) Is the kinetic energy increasing (AK > 0), decreasing (AK <0) or unchanged (AK = 0)? is the work done on the block mi by each force positive, negative, or zero? Wgravity V Zero V Wwarmaljove Zero V V Negative V V Wset: Positive V V ??: Positive V V