If a ship is moving forward has positive acceleration what can be said about the velocity of the ship?
1 answer:
Increasing
Explanation:
If a ship is moving forward and has a positive acceleration, we can say that the velocity of the ship is increasing.
Velocity is the rate of change of displacement of a body with time.
Acceleration is the rate of change of velocity with time.
Acceleration =
If a ship is moving with positive acceleration, the velocity of the ship is increasing also.
- This is because when velocity is increasing, the change will be positive.
- From the equation, to have positive velocity, the final velocity must be greater than the initial one.
- With this, acceleration will be positive.
- So we can say, velocity of the ship is increasing.
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Answer:
52 mm/s (approximately)
Explanation:
Given:
Initial speed of the projectile is,
Angle of projection is,
Time taken to land on the hill is,
In a projectile motion, there is acceleration only in the vertical direction which is equal to acceleration due to gravity acting vertically downward. There is no acceleration in the horizontal direction.
So, the velocity in the horizontal direction always remains the same.
The horizontal component of initial velocity is given as:
Now, the velocity in the vertical direction goes on decreasing and becomes 0 at the highest point of the trajectory. So, at the highest point, only horizontal component acts.
Therefore, the projectile's velocity at the highest point of its trajectory is equal to the horizontal component of initial velocity and thus is equal to 52 mm/s.