Linear Motion
Vectors and Projectiles
Newton's 2nd law
Momentum
Energy
100
Superman is off to visit Lois Lane. He sees he’s late and increases his flying speed. If he accelerates uniformly from 1200 m/s to 1600 m/s in 0.40 seconds, then what is his rate of acceleration?
1000 m/s2
100
Some Antarctic explorers heading due south toward the pole travel 50. km during the first day. A sudden snowstorm slows their progress and they move only 30. km on the second day. With plenty of rest, they travel the final 65 km the last day and reach the pole. What was the explorers’ displacement?
145 km south
100
What relationship does mass have with weight?
An object’s weight is directly proportional to its mass. Weight = mg. If you triple the object’s mass, its weight is tripled
100
Which has a greater momentum, a heavy truck at rest or a moving skateboard?
skateboard
100
Renatta Gass is out with her friends. Misfortune occurs and Renatta and her friends find themselves getting a workout. They apply a cumulative force of 1080 N to push the car 218 m to the nearest fuel station. Determine the work done on the car.
2.35 x 105 J
200
Barney is walking with all his good friends. If he began walking away from Lucy 12 seconds ago at an average speed of 1.5 m/s and is now 25 m from Lucy, the how far from her was he when he began walking?
7 m
200
Shareen finds that when she drives her motorboat upstream she can travel with a speed of only 8 m/s, while she moves with a speed of 12 m/s when she heads downstream. What is the current of the river on which Shareen is traveling?
2 m/s downstream
200
What is the acceleration of a 4,000 kg car pushed with a force of 12,000 N?
3 m/s/s
200
Which has more momentum, a large truck moving at 30 miles per hour or a small truck moving at 30 miles per hour?
the large truck
200
Sheila has just arrived at the airport and is dragging her suitcase to the luggage check-in desk. She pulls on the strap with a force of 190 N at an angle of 35° to the horizontal to displace it 45 m to the desk. Determine the work done by Sheila on the suitcase.
7.0 x 103 J
300
Mike lets his bike roll down a hill beginning from rest and accelerating uniformly. If he rolls 125 m in 25 s, then what was his rate of acceleration?
0.4 m/s2
300
Amit flies due east from San Francisco to Washington, D.C., a displacement of 5600. km. He then flies from Washington to Boston, a displacement of 900. km at an angle of 55.0° east of north. What is Amit’s total displacement?
6360 km
300
What is the mass of a car pushed with 13,000 N that accelerates at 1 m/s/s?
13,000 kgs
300
Suppose a girl is standing on a pond where there is no friction between her feet and the ice. The best way (according to your physics teacher) to get off the ice is too: A. get on her hands and knees and crawl of the ice B. bend over touching the ice in front of her, then bring her feet to her hands. C. throw something in the direction opposite to that in which she wants to go. D. walk very slowly on tiptoes.
C
300
Lamar Gant, U.S. powerlifting star, became the first man to deadlift five times his own body weight in 1985. Deadlifting involves raising a loaded barbell from the floor to a position above the head with outstretched arms. Determine the work done by Lamar in deadlifting 300 kg to a height of 0.90 m above the ground
2.6 x 103 J
400
According to an article in Business Week, the 2008 Corvette can go from zero to 60 mph in just 4.2 seconds. Assuming acceleration is uniform, then how much track length did it take to accomplish this?
56.7 m
400
Marcie shovels snow after a storm by exerting a force of 30.0 N on her shovel at an angle of 60.0° to the vertical. What are the horizontal and vertical components of the force exerted by Marcie?
Horizontal: 26.0 N Vertical: 15.0 N
400
What is the mass of a car pushed with 19,000 N that accelerates at 10 m/s/s?
1,900 kgs
400
Two objects, A and B, have the same size and shape, but A is twice as heavy as B. When they are dropped simultaneously from a tower, they reach the ground at the same time but A has a greater ..
momentum
400
A new conveyor system at the local packaging plan will utilize a motor-powered mechanical arm to exert an average force of 890 N to push large crates a distance of 12 meters in 22 seconds. Determine the power output required of such a motor.
490 W (rounded from 485 W)
500
If a 2008 Corvette can go from zero to 60 mph in 4.2 seconds, how fast would it be going at the end of 100 m assuming acceleration is constant?
35.9 m/s
500
Ivan pulls a sled loaded with logs to his cabin in the woods. If Ivan pulls with a force of 800. N in a direction 20.0° above the horizontal, what are the horizontal and vertical components of the force exerted by Ivan?
Horizontal: 752 N Vertical: 274 N
500
What two principal factors affect the force of air resistance on a falling object?
The speed of the falling object and its shape ( the larger the surface area perpendicular to the direction of motion, the larger the air friction).
500
When you are in the way of a moving object and a collision is sure to occur, are you better off decreasing its momentum over a short time or over a long time? Explain
The amount of force you will feel is the same as the force you apply to the object. So if you decrease its momentum over a long time, less force is needed to act. So, you would be “better off” exerting a small force for a long time.
500
During the Powerhouse lab, Jerome runs up the stairs, elevating his 102 kg body a vertical distance of 2.29 meters in a time of 1.32 seconds at a constant speed. a. Determine the work done by Jerome in climbing the stair case. b. Determine the power generated by Jerome.
a. 2.30 x 103 J b. 1.73 x 103 W
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