Answer:
C) 2.24 s
Explanation:
Speed of sound in air at 25 degree = 346 m /s
Speed of sound in sea water = 1533 m/s
Time taken by sound to reach dolphin
= 1000 / 1533 = 0.6523 s
Time taken by sound to reach boatman
1000/ 346
= 2.89 s
Difference
= 2.89 - .6523
= 2.24 s
Acceleration = final velocity - initial velocity/time taken
A = Vf-Vi/t
A = 1 m/s - 0 m/s / 4 sec
A = 1 m/s / 4 sec
A = 0.25 m/s2
Answer:
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Answer:

Explanation:
Force is the push or pull on object that can cause different things, like acceleration. According to Newton's 2nd Law of Motion, it is the product of mass and acceleration.

The mass of the wolf is 50.5 kilograms and the acceleration is 5.0 meters per square second. Therefore:
Substitute the values into the formula.

Multiply.

- 1 kilogram meter per square second is equal to 1 Newton.
- Our answer of 252.5 kg*m/s² is equal to 252.5 Newtons.

The force required is <u>252.5 Newtons</u>.