A weight W is now placed on the block and
7.7 N is needed to push them both at constant
velocity.
What is the weight W of the block?
Answer in units of N.
Information from a previous question, probably about the coefficient of friction, is needed to answer this.
What you need to do is use the equation
Ffriction=coefficient of friction*Normal.
and remember that normal is the total weight of the objects.
To find the weight W of the block, we need to consider the forces acting on the block.
According to the problem, a force of 7.7 N is required to push the block and the weight together at a constant velocity. This force is necessary to overcome the force of friction between the block and the surface it is on.
The force of friction can be found using the equation:
Frictional force (Ff) = μ * Normal force (FN)
where μ is the coefficient of friction and FN is the normal force exerted on the block.
Since the block is at a constant velocity, the sum of the forces acting vertically must be zero. This means that the weight of the block (W) is equal to the normal force (FN).
Given that the force required to push the block and weight together is 7.7 N, and assuming there is no vertical force acting on the block:
W = FN = 7.7 N
Therefore, the weight of the block is 7.7 N.
To find the weight W of the block, we need to consider the forces acting on the block.
First, we know that the weight of an object is the force exerted on it due to gravity. The weight of an object can be calculated using the formula:
Weight = mass × acceleration due to gravity
Since we are given the force required to push the block and the block is moving at a constant velocity, we can conclude that the net force acting on the block is zero. This means that the force of gravity acting downwards on the block is balanced by the force pushing the block upwards.
So, we can set up the following equation:
Weight of the block - 7.7 N = 0
Since the net force is zero, we can equate the weight of the block to 7.7 N:
Weight of the block = 7.7 N
Therefore, the weight of the block is 7.7 N.