B.1 Part 1
To find distance on a speed-time graph.
What is the area under the line?
A naturalist observed a cheetah reach a speed of 19 m/s from a standing start in a period of 2.0 s. What was the cheetah’s acceleration?
What is 9.5 m/s2 ?
A girl applied 400 J of work on a 27.0 kg box. How much energy did she exert?
What is 400 J ?
A 3.5 kg sled has 450 J of gravitational potential energy in respect to the bottom of a hill. What is the height (vertical distance) of the hill?
What is 13 m ?
True or False:
Heat flows spontaneously from cooler to warmer areas without any work.
False
65 ̊ N of E as bearings reference.
HINT: draw it out first!
What is 25 ̊ ?
The time it takes John to stop with an acceleration of 2.5 m/s2 and a velocity of 13.5 m/s.
Remember sig digs
What is 5.4 seconds?
How much force is required to accelerate a 2000 kg car at 3.0 m/s2 ?
What is 6.0 x 103 N ?
The kinetic energy of a shot putter heaving a 7.30 kg shot with a speed of 8.5 m/s.
What is 2.6 x 102 J ?
Increasing the heat of your milk mixes your hot chocolate powder faster due to what?
What is entropy?
A jogger runs 600m [N] in 250s, then turns around and runs 450m [S] in 150s. Determine the jogger’s average speed in m/s.
Round your answer to proper sig digs.
2.63 m/s
A motorcycle with an initial velocity of 8.0 m/s (E) accelerates at 6.0 m/s2 (E). How long will it take the motorcycle to reach a final velocity of 42.0 m/s (E)?
What is 5.7 seconds
The space shuttle has a mass of 3.10 x 106 kg. If, when the main engines fire, a force of 1.5 x 107 N acts upward, what is the acceleration rate of the shuttle?
What is 4.8 m/s2 ?
What is the power of a colour television set that uses 1.5 x 107 J in 150 hours? The final answer is in watts.
What is 28 watts ?
True or false:
Energy conversions can be 100% efficient.
False
A jogger runs 600m [N] in 250s, then turns around and runs 450m [S] in 150s. Determine the jogger’s average velocity in m/s.
Round your answer to proper sig digs.
0.375 m/s [N]
On a velocity-time graph, what does a constant downward line represent?
What is constant negative acceleration?
What is the weight of an 8.5 kg mass on the earth's surface?
What is 83 N ?
A bike rider approaches a hill with a speed of 9.2 m/s. The total mass of the bike and rider is 74 kg.
This will be the height at which the bike will come to a stop (assuming no friction).
What is 4.3 m?
What is the efficiency of an engine that has an input of 8200 J of energy but does 4400 J of useful work?
What is 53.66 % ?
A boat travels at a velocity of 8.00 m/s [S] for 12.0 s. What is the displacement of the boat?
Remember sig digs!
-96.0 m / 96.0 m [S]
An elk moving at an initial velocity of 26 km/h (N) accelerates at 1.8 m/s2 (N) for 10.4 s. Calculate the maximum velocity it attains. Express your final answer in km/h.
What is 93 km/h ?
The gravitational potential energy of a 5.0 kg gargoyle 20 m high on a building becomes dislodged and falls to the ground.
Remember sig digs
What is 9.8 x 102 J?
What would be the maximum speed that could be attained by a pendulum bob that is lifted a vertical distance of 80.0 cm?
What is 3.96 m/s ?
Calculate the percent efficiency of a light bulb inputting 165 J of energy and outputting 75 J of wasteful heat energy.
What is 58% ?