Use net force to calculate acceleration
The idea
Find the net force, combining all stated forces with direction.
Step by step
- Find the net force, combining all stated forces with direction.
- Use acceleration = net force ÷ mass.
- The acceleration direction follows net force; it need not match the current velocity.
Example
A 4 kg cart experiences a net force of 12 N to the right. What is its acceleration magnitude?
Answer
3 m/s2
a = 12 ÷ 4 = 3 m/s2, directed right.
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Compare the acceleration of 2 kg and 4 kg carts under the same 12 N net force. Explain the role of mass.
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