Unit 2 Exam help

Question 1 o Study the image. B C A \"" 4 MD © 2016 FlipSwitch Which arrow represents the normal force on the box? [ v B A D Question 2 o Study the image. Then answer the following question.

. 221 = R £ B <5 i N O Question 11 @ A puck is sliding along a frictionless surface at constant velocity. Which of the following choices correctly models the forces acting on the puck? initial push (person on puck) gravitational (Earth on puck) Arrows and labels added by FlipSwitch. Ciine, Dusty/Shutterstock F normal (surface on puck) initial push (person on puck) gravitational (Earth on puck)

Question 19 o A child pushes a desk with a force of 15 N to the right. The desk accelerates to the right. Which of the following statements correctly represents Newton’s third law and the interaction between the child and desk? The desk exerted exactly 15 N of force on the child, but the force is directed to the left. The desk exerted slightly more than 15 N of force on the child, but the force is directed to the left. The desk did not exert any force on the child. The desk exerted slightly less than 15 N of force on the child, but the force is directed to the left. Question 20 o Study the image F, and on apple /R ¥, Earth on apple Which of these correctly explains whether this image is an example of

(2 = D <) a N O N Question 27 @ Two crates are submerged under water. The crates are identical in size, but Crate A is filled with iron and Crate B has only air inside. Which crate has a greater buoyant force acting on it? Both crates have the same amount of buoyant force acting on them because they are the same size and displace the 'same amount of water. Crate A has a greater buoyant force acting on it because it is filled with iron, making it heavier. Buoyant force depends X on the weight of the object. Crate B has a greater buoyant force acting on it because it is filled with air, so it will float. The object that floats will always have a greater buoyant force acting on it. There is no way of knowing which object has a greater buoyant force acting on it until we can determine if they float. If both objects float, they have the same amount of buoyant force acting on them. Question 28 @ A ball with a density of 1100 kg/m3 is submerged in two liquids: water (p = 1000 kg/m?) and honey (p = 1400 kg/m®). What will the ball do? We do not have enough information because we need to know the mass of the ball in order to determine whether it will sink or float. The ball will sink in both the honey and the water because any solid object will sink in a liquid. It will sink and accelerate downwards in honey. It will float and accelerate upwards in water. Objects with a smaller density than the surrounding liquid sink, while objects with a greater density than the surrounding liquid float. It will sink and accelerate downwards in water. It will float and accelerate upwards in honey. Objects with a greater density than the surrounding liquid sink, while objects with a smaller density than the surrounding liquid float. Question 29 0 A balloon filled with some liquid is inflated and immersed under water.