Answer:
43 revolutions.
Explanation:
The time it takes for the car to stop is
The distance it travels in that time is
The number of revolutions that the tires make is then
<em>The last calculation just asks the question "how many tire circumferences fit into d=113 meters?"</em>
Explanation:
The kinetic energy of an object is given in terms of its mass and object as :
An object with more mass has more kinetic energy. An object with less mass, if both objects are moving at the same speed, in opposite directions, will have less kinetic energy. The square of v will give positive number.
Answer:
the answer is b
Explanation:
if it was equal they would move away from each other
Consider the formula W = E^2/R
E is the same for both bulbs. Everything depends on R
Let us suppose that E = 100 volts (high consumption day).
Let us further suppose that r = 2 ohms
W = 100^2 / 2
W = 10,000 / 2
W = 5000 watts . (It's just a number).
---------------
The second bulb has a resistance of 1 ohm.
W = 100^2 / 1
W = 10000 watts.
The lower the resistance the higher the wattage.
Answer:
10m/s
Explanation:
a = v- u/ t
=> v = at + u
= -2 × 5 + 20
= 10m/ s. ( 72 km/ h = 20 m/ s)