Answer:
75.7238461542 kg
20.4664723031 m
Explanation:
F = Force = 82 N
t = Time taken
u = Initial velocity
v = Final velocity
s = Displacement
a = Acceleration
Force is given by
The mass of the block is 75.7238461542 kg
Distance moved in the next 4.2 seconds
The distance moved is 20.4664723031 m
Work = force x distance
Work= 60N x 15m
Work= 900 Newton-meter
Answer:
The force exerted by the ball on the bat has a magnitude of 100 N and its direction is exactly opposite to that of the force exerted by the bat on the ball.
Explanation:
Recall that Newton's third law tells us that : "For every action, there is an equal and opposite reaction."
Therefore if the bat acts on the ball with a force of 100 N, the ball acts on the bat with a similar magnitude of force (100 N) but direction opposite to the original force.
We're given the velocity at two points, and the time between the mentioned two points.
What we'll be calculating is the average acceleration (not to be confused with instantaneous acceleration).
Given two points, lets call them initial and final, the average acceleration is calculated as:
In which
is the final velocity (in your problem equal to 1m/s),
is the initial velocity (in your problem equal to 16 m/s), and
the time between two points (in your problem equal to 2s).
So, we plug-in our known values:
The answer is -7.5m/s^2.