A toy car is tied to a string and pulled across a table horizontally. Which is the
2 answers:
Answer:
Correct answer is option D
Explanation:
In this question we have given that toy car is tied to a string and pulled across the table
Therefore there must be three forces which will act on toy car, these are as follows
1. Force due to gravity
2. Normal reaction force
3. Tension in string
Force due to gravity will act in downward direction therefore to balance it there must be a normal force which will act in upward direction
since the toy car is not accelerating in the y direction.
Since the car is accelerating in horizontal direction therefore tension force will act in the horizontal direction therefore, will act to the right.
Answer:
D
Explanation:
With acting as a downward force, there must be a normal force counteracting it, because the toy car is not accelerating in the y direction. This force is the Normal Force or
.
The Tension force must be going in the horizontal direction because the toy car is being pulled horizontally, so mist be going to the right.
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To solve this problem we will start using the concepts related to the electric field, from there we will find the load exerted on the body. Through this load it will be possible to make a sum of forces in balance to find the load that a human supports. Finally with these values it will be possible to find the repulsive force. We will proceed as follows,
The electric field is
Here,
k = Coulomb's Constant
Q = Charge
R = Distance (At this case from the center of mass of the earth to the surface)
Rearranging to find the charge,
Replacing,
Since the electric field is directed towards the center of earth, the charge is negative.
PART A) Once the load is found we can proceed to apply the balance of Forces, for which the electrostatic force must be equivalent to the weight, this in order to satisfy the balance, therefore
Replacing,
Solving for q,
PART B) Finally using the given distance and the values of the found load we can find the repulsive Force, which is
PART C) The answer is no. According to the information found, we can conclude that traveling through an electric field is not viable because there is a repulsive force of great magnitude acting on the body.