Significant Digits & Scientific Notation
(1 minute each)
(1 minute each)
The number 10.060 contains how many significant digits?
5
Acceleration is a _______________ quantity.
Vector
The slope of a distance vs. time graph represents the __________________.
Which quantity describes the path that is taken between two points?
Distance
When you throw a ball into the air, and it reaches its maximum height, what kind(s) of energy is/are present?
Potential Energy
The value of 1275 written correctly as two significant digits would be?
1.3 x 103 or 1300
Distance is a _______________ quantity.
Scalar
The area under a velocity vs. time graph represents the __________________.
Displacement
A car accelerates from rest to a speed of 16.7m/s in a time of 9.33 s. What is the acceleration of the car?
Acceleration = 1.79 m/s2
A bobsled including its riders, has a mass of 250 kg, how much potential energy does the bobsled have as it is about to start its run at a height of 121m?
3.0 x 105 J or 300,000J
The number 12000 has how many significant digits?
2
Force is a _______________ quantity.
Scaler
The slope of a velocity vs. time graph represents the __________________.
Acceleration
An athlete runs 100.0 m in 12.2 s. What is her speed in m/s and in km/h?
Speed = 8.20m/s and 29.5km/h
A race car races a 100 m sprint track at a velocity of 9.50 m/s. If the car's kinetic energy is 9.40 x 103J what is its mass?
m = 200kg
4.000m/s x 2.430m/s = _________.
9.720m2/s2
Energy is a _______________ quantity.
Scaler
The area slope of a displacement (m [N]) vs. time (s) graph is 45. What can we conclude from this information?
Velocity = 45m/s [N]
If Gretzky shoots the puck at a speed of 90 km/h from the top of the offensive face-off circle 15 m from the net, how long will the puck take to reach the net?
t =0.6 s
Approximately 4.20 X 104 kJ of energy from sunlight strikes the leaves of a plant in one day. Of this energy 4200.0 kJ is converted into useful energy by the plant. The efficiency of photosynthesis in this plant is: ___ %
10.0 %
4.0010m - 3.0m = _________. Record your answer to the appropriate number of significant digits.
1.0m
Velocity is _______________ quantity.
Vector
The area under a velocity (m/s 90˚ [S] of [W]) vs. time (s) graph is 56. What can we conclude from this information?
Displacement = 56 m 90˚ [S] of [W]
Some spiders are capable of moving up to 16 km/h. Moving at maximum speed, what is the shortest time it would take a Sun Spider to run between two fig trees that are 3.6 m apart?
t = 0.81s
In a toy, a 92.4 g ball rolls into a spring and compresses the spring. If the ball is rolling at 4.28 m/s when it collides with the spring and, at maximum compression, the spring is storing 0.560 J of elastic potential energy, with what efficiency is the ball’s kinetic energy converted into elastic potential energy of the spring?
66.2%