1. a body of mass 40kg is given an acceleration of 10ms/2 on a horizontal ground for which the coefficient of friction 0.5, calc
1 answer:
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Answer:
Acceleration, a = 750m/s²
Explanation:
Given the following data;
Radius, r = 0.31m
Velocity, v = 15m/s
To find the centripetal acceleration;
Substituting into the equation, we have;
Acceleration, a = 750m/s²
Therefore, the centripetal acceleration of the bike wheel is 750m/s².
Answer:
To make it into the pool you must run and jump at
Explanation:
Horizontal Launch
When an object is thrown with a specified initial speed in the horizontal direction, it describes a curved path that finishes when it hits the ground level after traveling certain horizontal distance x and a vertical height y from the launching point. The horizontal speed is always constant and the vertical speed increases due to the effect of gravity. It can be found that the horizontal distance reached by the object when launched at an initial speed in a given time t is
And the vertical distance is
If t is the total flight time, then x and y are maximum and we can find a relation between them. Solving for t in the first equation
Substituting in the second equation
Rearranging
Solving for
There are many applications for the horizontal launch. One common situation is when someone wants to drop something on certain terrain at a specific approximate point when traveling in a plane at a given height. Once the object is left fall, it has the same speed as the plane, so the plane speed can be estimated to make the best possible launch, or given that speed, we can know in advance where the object will reach ground level