Download Test 3 | PHYS 103 - Conceptual Physics and more Quizzes Physics in PDF only on Docsity!
Inertia property of objects to maintain their states of motion TERM 2 Which depends on location weight or mass? Which depends on gravity weight or mass? DEFINITION 2 Location-mass gravity-weight TERM 3 Where would your weight be greater on the earth or on the moon? How about your mass? DEFINITION 3 weight is greater on the earth mass stays the same TERM 4 What are the units of measurement for weight and for mass? DEFINITION 4 weight-lbs or newtons mass-kg TERM 5 One kilogram weighs 10 N on earth. Would it weigh more or less on the moon? DEFINITION 5 less
What is the net force on a box that is being pushed to the right with 50 N of force, while it is also being pushed to the left with 20 N of force? 30 N TERM 7 How much tension is there in a vertical rope that holds a 20-N bag of apples at rest? DEFINITION 7 180N TERM 8
- What does sigma F = 0 mean? DEFINITION 8 The vector sum of forces; the sum is equal to zero; equilibrium TERM 9 A bowling ball sits at rest. Another ball rolls down a lane at constant speed. Which, if either, is in equilibrium? Defend your answer. DEFINITION 9 The bowling ball is in equilibrium because gravity is pulling it down while the floor pushes which acts as a support force. The rolling ball is also in equilibrium because it is a constant speed in a straight line. Equilibrium= no change. TERM 10 If we push a crate at a constant velocity, how do we know how much friction acts on the crate compared with our pushing force? DEFINITION 10 When the crate is moving at constant velocity your force is equal to the force of friction.
What is the acceleration of an object in free fall at the earths surface? 10 m/s TERM 17 What physical quantity is a measure of how much inertia an object has? DEFINITION 17 mass TERM 18 Gravitational force on the moon is only 1/ that of the gravitational force on the earth. What would be the weight of a 10-kg object on the moon and on the earth? What would its mass be on the moon an on the earth? DEFINITION 18 60 kg on the earth Mass on the moon and earth- 98 N TERM 19 A hockey puck slides across the ice at a constant velocity. Is it in equilibrium? Why or why not? DEFINITION 19 Yes, because it is at a constant velocity TERM 20 Suppose that a freely falling object were somehow equipped with a speedometer. By how much would its speed reading increase with each second of fall? DEFINITION 20 10 m/s
Suppose that the freely falling object in the preceding exercise were also equipped with an odometer. Would the readings of distance fallen each second indicate equal or unequal distances of fall for successive seconds? Explain. Equal distances because the distance of the free fall from rest is directly proportional to the square of the time of the fall.
