Suppose that the force on the block FT is increased so that the block accelerates (starting from rest) at a = 2.2 m/s2.
Now what is the net work done by all the
forces acting on the block as it moves a distance of 15 m?
1. Wnet = −1968.75 J
2. Wnet = 1155 J
3. Wnet = 2802.64 J
4. Wnet = 1968.75 J
5. Wnet = 1134.85 J
6. Wnet = −1155 J
tw4
To find the net work done by all the forces acting on the block, we can use the formula:
Net Work = Force x Distance
First, we need to calculate the force acting on the block. We know that the acceleration of the block is 2.2 m/s^2. To find the force, we can use Newton's second law:
Force = Mass x Acceleration
Since the question does not provide the mass of the block, we cannot calculate the force accurately. Without knowing the mass, we cannot find the net work done.
Therefore, the correct answer is:
7. Cannot be determined without knowing the mass of the block.
To find the net work done by all the forces acting on the block as it moves a distance of 15 m, you need to use the equation:
Wnet = Fnet * d
where Wnet is the net work done, Fnet is the net force acting on the block, and d is the distance the block moves.
Since the block is accelerating, we can use Newton's second law to find the net force acting on the block:
Fnet = m * a
where m is the mass of the block and a is the acceleration.
Given that the block is starting from rest and accelerates at 2.2 m/s^2, we need to find the net force. However, we are not given the mass of the block.
To find the net force, we can rearrange the equation for net force:
Fnet = m * a
as:
m = Fnet / a
We can now use the value of acceleration (a = 2.2 m/s^2) to calculate the mass of the block.
Next, we can substitute the mass and acceleration into the equation for net force to find the net force acting on the block.
Once we have the net force, we can calculate the net work done using the equation Wnet = Fnet * d, where d = 15 m.
By performing these steps, you can determine the correct answer from the options given.