Question

Question 7
An animal is walking forward. There is an applied force from the animal of 25 N to the right, a frictional force of 18 N to the left, a force of gravity of 65 N down and the animal is being pushed up by the ground with 65 N. What best describes the motion of the animal?



a
The animal will move to the left due to an unbalanced force on the left
b
The animal will move to the right due to an unbalanced force on the right
c
The animal will move down due to an unbalanced force down
d
The animal will move up due to an unbalanced force upwards

Answer 1

To determine the motion of the animal, we can analyze the forces acting on it:

- **Applied force** to the right: 25 N
- **Frictional force** to the left: 18 N
- **Force of gravity** downwards: 65 N
- **Normal force** (ground pushing up): 65 N

Now we can break it down into two dimensions:

1. **Horizontal (left-right) forces**:
- Net force = Applied force (right) - Frictional force (left)
- Net force = 25 N (right) - 18 N (left) = 7 N (right)

2. **Vertical (up-down) forces**:
- Net force = Normal force (up) - Force of gravity (down)
- Net force = 65 N (up) - 65 N (down) = 0 N (there is no net vertical force)

Since there is a net force of 7 N to the right and no net vertical force, the animal will move to the right due to this unbalanced force.

Therefore, the best description of the motion of the animal is:

**b. The animal will move to the right due to an unbalanced force on the right.**