20 What Is The Time Required For An Object Starting From Rest To Fall Freely 500 Meters Near Earth S Surface A 51 0 S 1 (121.06 KiB) Viewed 47 times
20 What Is The Time Required For An Object Starting From Rest To Fall Freely 500 Meters Near Earth S Surface A 51 0 S 2 (53.39 KiB) Viewed 47 times
20) What is the time required for an object starting from rest to fall freely 500 meters near Earth's surface? A) 51.0 s B) 10.15 C) 7.14 s D) 25.5 8 21) A ball is thrown with an initial speed of 10 meters per second. At what angle above the horizontal should the ball be thrown to reach the greatest height? B) 30.0 C) 45° D) 90. A) 0° 22) A ball is hit straight up with an initial speed of 28 meters per second. What is the speed of the ball 2.2 seconds after it is hit? [Neglect friction.] A) 22 m/s B) 6.4 m/s C) 4.3 m/s D) 28 m/s 23) A ball is rolling horizontally at 3.00 meters per second as it leaves the edge of a tabletop 0.750 meter above the floor. The ball lands on the floor 0.391 second after leaving the tabletop. What is the magnitude of the balls acceleration 0.200 second after it leaves the tabletop? [Neglect friction.] A) 1.96 m/s2 B) 7.65 m/s2 C) 15.3 m/s2 D) 9.81 m/s 24) A ball is thrown with a velocity of 35 meters per second at an angle of 30.º above the horizontal. Which quantity has a magnitude of zero when the ball is at the highest point in its trajectory? A) the acceleration of the ball B) the momentum of the ball C) the vertical component of the ball's velocity D) the horizontal component of the ball's velocity
26) An object weighing 2.0 newtons is pushed across a horizontal, frictionless surface by a horizontal force of 4.0 newtons. The magnitude of the net force acting on the object is A) 2.0 N B) 0.0 N C) 8.0N D) 4.0 N 27) A rubber block weighing 60. newtons is resting on a horizontal surface of dry asphalt. What is the magnitude of the minimum force needed to start the rubber block moving across the dry asphalt? A) 32 N B) 51 N C) 40. N D) 60. N
Join a community of subject matter experts. Register for FREE to view solutions, replies, and use search function. Request answer by replying!