15 An object sits on a frictionless surface A 16 N

Last updated: 6/15/2023

15 An object sits on a frictionless surface A 16 N horizontal force is applied to 2 0 m s What is the mass of the object a 8 0 kg b 78 N c 4 0 kg d 32 kg 16 You are standing in a moving bus facing forward and you suddenly fall toward the front of the bus You can imply from this that the bus s a velocity decreased b velocity increased C d speed remained the same but it s turning to the left speed remained the same but it s turning to the right 17 A ball falls from the top of a building through the air to the ground below Air resistance acts on the bellet falls How does the kinetic energy E just before striking the ground compare to the gravitational energy E at the top of the building a b E is equal to E E is less than E E is greater than E d It is impossible to tell 18 A person is standing on a scale in an elevator accelerating downward Compare the reading on the scale to the person s true weight a greater than their true weight b less than their true weight c equal to their true weight d zero 19 A 1 2 kg ball of clay is released from a height of 1 3 m above the ground How much thermal energy is generated when it hits the ground and comes to a stop a OJ b 1 6 J C 4 8 J 20 A constant net force acts on an object Describe the motion of the object a constant speed b increasing acceleration C constant acceleration d constant velocity 21 According to Newton s 2nd Law the acceleration of an object is directly proportional to a its velocity b its mass its position the net force acting on it 22 A 90 kg object has a weight of a 882 N d 15 J b 9 18 c 90 N d 99 8 N