This Grade 3 science worksheet gives multi-force problems using balanced and unbalanced forces. Four multiple choice items ask students to predict motion when pushes are equal, opposite, added, or changed mid-motion. Five fill-in blanks reinforce vocabulary such as balanced, unbalanced, change, extra, and motion. Scenarios include tug-of-war, a book on a desk, and a rolling cart. This sheet supports NGSS 3-PS2 by asking Grade 3 students to reason carefully about total force on everyday objects.
Style:
Forces and Motion
Part A: Multiple Choice
Circle the best answer for each question.
1. Two Grade 3 students push a box in opposite directions with equal force. What happens?
A) The box does not move because forces are balanced
B) The box speeds up in one direction
C) The box lifts off the floor
D) The box bounces back and forth
2. A cart is rolling forward. A Grade 3 student now pushes it forward with more force. What happens?
A) The cart stops right away
B) The cart speeds up in the forward direction
C) The cart turns around
D) The cart keeps the same speed
3. Two teams are tied in tug-of-war. One team then pulls harder. What will happen?
A) The rope stays still
B) The rope breaks in two
C) The rope moves toward the stronger team
D) Both teams fall down at once
4. A book rests on a Grade 3 desk without moving. Which statement is true?
A) No forces are acting on the book
B) Only gravity acts on the book
C) Gravity and the desk push are balanced
D) The book is about to fly up
Part B: Fill in the Blank
Write the correct answer on each line.
1. When forces on an object are balanced, its motion does not change.
2. When forces are not equal, we call them unbalanced forces.
3. A still object has forces that are balanced or no forces acting at all.
4. To speed up a moving cart, you need an extra push in the same direction.
5. If balanced forces become unbalanced, the object will change its motion.
Forces and Motion
★ Part A: Multiple Choice
Circle the best answer for each question.
1. Two Grade 3 students push a box in opposite directions with equal force. What happens?
A) The box does not move because forces are balanced
B) The box speeds up in one direction
C) The box lifts off the floor
D) The box bounces back and forth
2. A cart is rolling forward. A Grade 3 student now pushes it forward with more force. What happens?
A) The cart stops right away
B) The cart speeds up in the forward direction
C) The cart turns around
D) The cart keeps the same speed
3. Two teams are tied in tug-of-war. One team then pulls harder. What will happen?
A) The rope stays still
B) The rope breaks in two
C) The rope moves toward the stronger team
D) Both teams fall down at once
4. A book rests on a Grade 3 desk without moving. Which statement is true?
A) No forces are acting on the book
B) Only gravity acts on the book
C) Gravity and the desk push are balanced
D) The book is about to fly up
★ Part B: Fill in the Blank
Write the correct answer on each line.
1) When forces on an object are balanced, its motion does not change.
2) When forces are not equal, we call them unbalanced forces.
3) A still object has forces that are balanced or no forces acting at all.
4) To speed up a moving cart, you need an extra push in the same direction.
5) If balanced forces become unbalanced, the object will change its motion.
Ready to Practice?
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9 Questions
12-18 minutes
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