Calculating Net Forces

Name:

Date:

📚 Part 1: Multiple Choice & Checkboxes

WALT: Calculate net forces acting on an object.

Success criteria: I can identify forces, calculate net force (include direction) and state the resulting motion.

1. A box is pulled 8 N to the right and 3 N to the left. What is the net force?

11 N to the right

5 N to the right

5 N to the left

8 N to the left

2. Two people push a trolley 7 N and 5 N in the same direction. What is the total force?

2 N

12 N in that direction

35 N

7 N opposite direction

3. If forces of 4 N upward and 4 N downward act on an object, the net force is:

8 N upward

0 N

4 N downward

2 N sideways

4. Check all true statements:

Contact forces include friction

Gravity is a non-contact force

If net force = 0, the object cannot be moving

An unbalanced net force causes acceleration

✏️ Part 2: Short Answers & Calculations

5. A scooter is pushed with 15 N to the right while friction acts with 6 N to the left. Calculate the net force and state the motion.

6. A crate is pushed 20 N to the right by one student and 15 N to the right by another. A third person pulls 10 N to the left. Find the net force and direction.

7. In a tug-of-war both teams pull with 300 N in opposite directions. What is the net force? What do you predict will happen to the rope?

8. Challenge: A toy car has three forces acting on it: 12 N right, 5 N left, and 3 N right. Calculate the net force and state whether the car will accelerate and in which direction.