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Brilliant_brown [7]
3 years ago
8

If a truck driver is driving at 30 mph and she makes a U-turn, then starts driving at 30 mph in the opposite direction, did the

driver's speed or velocity change after changing direction? Why?
PLEASE THE QUIZ IS DUE IN A BIT :(
Physics
1 answer:
AlekseyPX3 years ago
6 0

Answer:

i dont mow

Explanation:

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Which type of force can be in the same it opposite direction?
LuckyWell [14K]

Answer:

C) unbalanced

Explanation:

Equal forces acting in opposite directions are called balanced forces. Balanced forces acting on an object will not change the object's motion. When you add equal forces in opposite direction, the net force is zero.

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During the storm a tree fell over into a river what might happen to the tree
mart [117]
The tree might get swept away by the current and it will disappear when it catches on something
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What is the developmental period during which a person will experience the most amount of physical change?
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B. Adolescence

Explanation:

8 0
3 years ago
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Think of one example where Bob would need to calculate the net force on a person at the water park.
gregori [183]
Well Bob would need to calculate to net force of someone going down a water slide. Since the person is going down the slide, the person will go faster, depending on their mass/weight and the gravitational pull. As phrased in Newton’s Second Law.


Newton’s Second Law:
Newton's second law of motion pertains to the behavior of objects for which all existing forces are not balanced. The second law states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object.
7 0
3 years ago
A car traveling at 60 mph has how much more energy than a car going at 20 mph? How many times does the kinetic energy of a car i
irinina [24]

K.E. increases by 9 times

Explanation:

The kinetic energy of a car is given by:

KE=\frac{1}{2}mv^2

where

m is the mass of the car

v is its speed

From this definition, we see that the kinetic energy depends on the square of the velocity. Assuming that both cars have same mass, m, the kinetic energy of the first car is:

K_1 = \frac{1}{2}m(60)^2

while the kinetic energy of the second car is

K_2 = \frac{1}{2}m(20)^2

if we calculate the ratio, we get

\frac{K_1}{K_2}=\frac{(60)^2}{(20)^2}=3^2 =9

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3 years ago
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