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mamaluj [8]
3 years ago
14

How do you calculate the change in speed?

Physics
2 answers:
Dennis_Churaev [7]3 years ago
8 0

v = d/t

d = distance

t = time

the change in speed (Δv)

\tt \Delta v=\dfrac{d_2-d_1}{t_2-t_1}

marta [7]3 years ago
3 0
Multiply the acceleration by time to obtain the velocity change: velocity change = 6.95 * 4 = 27.8 m/s . Since the initial velocity was zero, the final velocity is equal to the change of speed. You can convert units to km/h by multiplying the result by 3.6: 27.8 * 3.6 ≈ 100 km/h .
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When the height of the cylinder increased by a factor of 5from 100 m to 500 m, what happened to the cylinder's
Lesechka [4]

Answer: It increased by a factor of 5

Explanation:

Gravitational potential energy P is given by the following formula:

P=mgh

Where:

m is the mass of the cylinder (assumed as constant)

g is the acceleration due gravity (assumed as constant)

h is the height of the cylinder

As we can see, P is directly proportional to h. Hence, if h increases by a factor of 5 P increases by a factor of 5, as well.

6 0
3 years ago
A boulder with a weight of 780 N is resting at the edge of a cliff that rises 123 m above the ground. What is the gravitational
-Dominant- [34]
Potential energy U = mgh

Given h = 123 m,
mg = F = 780 N

Then
U = (123)(780)
= 95940
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3 0
3 years ago
Some sharks can swim at average cruising speeds of three miles per hour. If a shark swam at that average speed for seven hours,
kari74 [83]

Answer:

21 miles

Explanation:

3 miles an hour for 7 hours

Its simply 7m*3m/hr=21 miles

8 0
3 years ago
The United States and South Korean soccer teams are playing in the first round of the World Cup. An American kicks the ball, giv
Aleks04 [339]

Answer:v=2.82 m/s

Explanation:

Given

initial velocity of ball(u)=3.6 m/s

ball rolls a distance(s) of 5 m

ball acceleration =-0.5 m/s^2

Velocity of ball when it is intercepted by Korean player

v^2-u^2=2as

v^2=3.6^2+2(-0.5)(5)=7.96

v=\sqrt{7.96}

v=2.82 m/s

3 0
3 years ago
a motorcycle is moving at a constant speend of 40 km/h. how long doesbit take for the motorcycle to travel a distance of 10 km
slava [35]
Time = distance/speed
thus = 10/40
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5 0
3 years ago
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