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10 Name:______________________ Score: Regents Physics Worksheet 2.1.1 – Newton’s Laws / Mass and Weight (10 points) Show all work – multiple choice answers MUST be proven for full credit! 1. Captain Jones is a 60.0 kilogram astronaut. a. 2. Calculate his weight on Earth. A 50 kilogram object is pulled with a net force of 100 newtons. a. Determine the acceleration of the object. [2.0 m/s2] [589 N] b. b. Determine his weight on the Moon where the acceleration due to gravity is 1.62 meters per 2 second . What force would be needed to make the object accelerate at a rate of 4.0 meter per 2 second ? [200 N] [97.2 N] c. Captain Jones weighs 530 newtons on Venus. Determine the acceleration due to gravity on Venus. _________________________________________________ 3. Sketch a graph that shows the relationship between an object’s weight and its mass. weight mass What does the slope of this graph represent? [8.83 N/kg] 4. Which of the following is subjected to a net, unbalanced force? (1) (2) (3) (4) a block hanging from a wire a ball at rest on a table a book sliding on a table at a constant velocity a rock free-falling toward the ground Proof: Explain your reasoning. 5. An object with mass M is subjected to a force of 100 newtons and accelerates at rate A. How much force would be needed to make mass M accelerate at rate 4A? (1) 25 N (2) 100 N (3) 200 N (4) 400 N Proof: Explain your reasoning/show calculations. _________________________________________________ 6. A 30 kilogram mass is moved from Earth to Mars where the 2 acceleration due to gravity is 3.77 meters per second . What is the object’s mass on Mars? (1) 294 N (2) 30 kg (3) 113 N (4) 7.96 kg Proof: Explain your reasoning/show calculations.