1 point 5 You hold a block on a horizontal, frictionless surface. It is connected by a string that passes over a pulley to a vertically hanging block (a modied Atwood machine). What is the magnitude of the acceleration of the hanging object after you release the block on the horizontal surface? Less than g More than g Equal tog Any of the other answers, depending on the masses of the blocks. _ 4 \"as as 1 point A box is sliding across a rough horizontal oor while Mary exerts a force on it. The magnitude of the kinetic friction component of the force the oor exerts on the box is larger than the magnitude of the force that Mary exerts on the box. Which of the fol lowing must be true about the motion of the box? The box must be moving in the direction Mary is pushing. The box must be moving opposite the direction Mary is pushing. The box must be slowing down. The box must be speeding up. 10:23 Done Bad-prod.instructure.com AA C = Return Submit on the block decreases. 3 1 point The following shows different forces exerted on an object in scenarios A through E. Some forces (like Fsono has been decomposed into its x and y - components shown with dashed arrows. Which scenario(s) could be true for an object accelerating towards the bottom-right? D m Fsono Fsono Fsono Fsono FHONO FHONO FHONG FHONO FEONO FEOnO FEONO Frono FFONO 0 0 0 0 0 monWD 4 1 point ADone 8 d-prod.instructure.com AA 0 A metal block at rest on a table is pulled by a rope attached to its side. The rope exerts a constant force on the block, initially in the horizontal direction. The rope is lowered so that it pulls at some angle 9 below the horizontal with the same magnitude. The block remains at rest when the angle of the rope is changed. Which of the following statements is true about the friction component of the force the table exerts on the block when the angle of the rope is changed? It stays the same because the block remains at rest. It decreases since the normal component of the force the table exerts on the block decreases. It decreases since the horizontal component of the force the rope exerts on the block decreases. It increases since the normal component of the force the table exerts on the block increases. It increases since the horizontal component of the force the rope exerts on the block decreases. A car accelerates along a road. Identify the best combination of forces exerted on the car in the horizontal direction that explains the acceleration. The static friction force exerted by the road in the direction of motion and the kinetic friction force exerted by the road in the opposite direction The force exerted by the engine in the direction of motion and the kinetic friction force exerted by the road in the opposite direction The static friction force exerted by the road in the direction of motion and the friction force exerted by the air in the opposite direction 10:24 Done Bad-prod.instructure.com AA C = Return Submit F Earth on Block O FIncline on Block Earth on Block O FIncline on Block FEarth on Block An 1 point In Testing Table 4.6 in the book (Section 4.5, Pg 103) we found that the two balls touched the ground at the same time. Which of the following quantities is/are also equal for both balls after they have been launched? Multiple answers could be correct. Average speed Speed at landing Acceleration in the ydirection Acceleration in the xdirection 1 point 1 point 5 You simultaneously release two balls: one you throw horizontally, and the other you drop straight down. Which one will reach the ground rst? Why? It depends on the mass of the ballsthe heavier ball falls faster so lands rst. The ball dropped straight down lands rst, since it travels a shorter distance. Neither. Their vertical motion is the same, so they will reach the ground at the same time. Done 8 d-prod.instructure.com AA 0 The box must be speeding up. 1 point 5 Which of the following must you do in order to keep a book sliding across a table at a constant speed? Exert a force on the book larger than the magnitude of the kinetic friction component of the force the table exerts on the book. Exert a force on the book smaller than the magnitude of the kinetic friction component of the force the table exerts on the book. Exert a force on the book equal in magnitude to the kinetic friction component of the force the table exerts on the book. Exert a force on the book equal in magnitude to the force Earth exerts on the book. n 1 point