1. A person on the ground throws a stone up onto the roof of a building. The initial velocity is 30 m/s at an angle = 45° above the horizontal. The stone hits the roof when it is a horizontal ϴ distance of 64 m from its launch point. What is the value of h, in m? Ignore air resistance. 2. An airplane is flying with its nose pointed north with a speed of 120 mph with respect to the air. The air is moving at 50 mph in an easterly direction with respect to the ground. The speed of the airplane with respect to the ground is _____ mph. A. 130 B. 140 C. 150 D. 160 E. 170 3. A block rests on a horizontal table. Which of the following statements is TRUE? (a) The acceleration of the block is g. (b) The normal force by the table and the weight of the block are a Newton’s third law pair. (c) The weight of the block is a force exerted by the block on the table. (d) The normal force by the table and the weight of the block have the same magnitude because of second law. Newton’s (e) The weight of the block is not a force.
1. A person on the ground throws a stone up onto the roof of a building. The initial velocity is 30 m/s at an angle ϴ = 45° above the horizontal. The stone hits the roof when it is a horizontal distance of 64 m from its launch point. What is the value of h, in m? Ignore air resistance. 2. An airplane is flying with its nose pointed north with a speed of 120 mph with respect to the air. The air is moving at 50 mph in an easterly direction with respect to the ground. The speed of the airplane with respect to the ground is _____ mph. A. 130 B. 140 C. 150 D. 160 E. 170 3. A block rests on a horizontal table. Which of the following statements is TRUE? (a) The acceleration of the block is g. (b) The normal force by the table and the weight of the block are a Newton’s third law pair. (c) The weight of the block is a force exerted by the block on the table. (d) The normal force by the table and the weight of the block have the same magnitude because of Newton’s second law. (e) The weight of the block is not a force.
PHYS_221_Johnston_michaelz_9_10.docx