Physics > EXAM > PHY 102 Week 4 Exam Solution (All)

PHY 102 Week 4 Exam Solution

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HIGLIGHT THE SINGLE CORRECT RESPONE • Which of the following activities best illustrates the practices of the scientific method? • Deciding on the materials necessary to build a terrarium. �... �� Following the instructions to construct an electric generator. • Measuring the time for an object to fall from different heights. • Designing an electric circuit for a radio. • What cannot be the outcome of a science experiment? • A theory is supported. • A theory is disproven. • A theory is proven. • A theory is further refined. • A truck makes a sharp turn and a box falls out of the truck bed. This is best explained using: • the law of inertia. • Newton’s second law of motion. • the law of action and reaction. • Newton’s third law of motion. • If an object increases its speed by the same amount each second, its acceleration: • also increases each second. • is constant. • decreases each second. • can either increase or decrease depending on the circumstances • Which of the following is NOT a part of the scientific method? • Making a guess about the possible outcome. • Perform experiments to test the predictions. • Organize and analyze the data collected. • Repeating a measurement until you get the desired result. • Formulating a rule based on the experimental results. • Consider a basketball player making a jump shot. Once the player's feet leave the floor, the player's acceleration: • depends on the speed of the player. • depends on the forward motion of the player. • depends on the athletic ability of the player. • is equal to 10 m/s2. • The acceleration of an object is caused by: a. a change in speed. • a change in velocity. • a change in direction. • an unbalanced force. • Which of the following describes an accelerated motion? • Driving uphill at a constant speed. • Driving downhill at a constant speed. • Driving around a circle at a constant speed. • Driving on a straight road at a constant speed. • A ball is placed at the top of a hill and then released. After 5 seconds it has a speed of 20 m/s. What is the average acceleration of the ball? • 10 m/s2 • 0 m/s2 • 100 m • 5 m/s2 • 4 m/s2 • A circus performer with a weight of 700 N hangs from the middle of a bar supported by a vertical rope at each end. What is the tension force in each rope? • 700 N b. 1400 N c. 350 N d. 1050 N e. 0 N • Which object has the greatest momentum? • A truck parked on the street. • A man walking up a flight of stairs. • A race car going around a turn at high speed. • A bicyclist rolling downhill. • A salmon swimming upstream. • Which of the following has the greatest density? [Show More]

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