Let's address each question one by one:
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How will an object at rest be affected if multiple forces working on it are opposed but unbalanced?
- Response: Motion will be either created, stopped or changed.
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A blue car weighing 1,302 kg is accelerating forward at a rate of 4 m/s². What is the forward force of the car?
- To find the force (F), we can use Newton's second law: \( F = m \cdot a \).
- Here, \( m = 1,302 , \text{kg} \) and \( a = 4 , \text{m/s}^2 \).
- \( F = 1,302 , \text{kg} \times 4 , \text{m/s}^2 = 5,208 , \text{N} \).
- Response: 5,208 N
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What information is needed to calculate the force one of the people exerts on the other person?
- According to Newton's second law, we need the mass and acceleration to calculate force.
- Response: the mass and acceleration of each person
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A soccer ball rests on the ground in a stationary position. Which of the following best describes the forces acting on the ball?
- Since the ball is stationary and not moving, the forces acting on it are balanced (the gravitational force is equal to the normal force).
- Response: balanced forces
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Two bowling balls of different masses collide while accelerating at 1.875 m/s². The first ball, rolling to the right, weighs 7 kg. The second ball, rolling to the left, weighs 4 kg. What force does the bowling ball weighing 7 kg exert on the bowling ball weighing 4 kg?
- To find the force exerted by the first ball (7 kg), we again use Newton's second law: \( F = m \cdot a \).
- The 7 kg ball is causing an acceleration of 1.875 m/s².
- \( F = 7 , \text{kg} \times 1.875 , \text{m/s}^2 = 13.125 , \text{N} \).
- Since the first ball is rolling to the right, the force exerted on the second ball (to the left) would be considered in the opposite direction.
- Response: 13.125 N to the right
I hope this clarifies your questions!
4 answers