Download Newton`s Second Law

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Newton’s Second Law
1. How much force is needed to accelerate a 1000-kg car at a rate of 3 m/s2?
2. If a 70-kg swimmer pushes off a pool wall with a force of 250 N, what is her acceleration?
3. Find the mass of a football player who weighs 1250 N.
4. A soccer player has a mass of 75 Kg. Calculate the player’s weight on earth.
5. How much is the mass of a sports car that weighs 9600 N?
6. Calculate the force of gravity on a foundation block that has a mass of 20 Kg?
7. (EC Science 8) An object that weighs 20 N on the earth’s surface weighs only 19.96 N on top of a
very high mountain. How much is the acceleration due to gravity on this very high mountain?
Use the Weight Comparison Table on pg.78 in the textbook for problems 8-12.
8. If an object’s weight on earth is 75 N, what is its mass?
9. What is the acceleration due to gravity of the object on Mars?
10. On which of the planets is the gravitational force the strongest? Explain your answer choice.
11. A woman astronaut has a mass of 60 kg. What will be her weight on the moon?
12. What will be her weight on Jupiter?
Newton’s Second Law
IPC
13. A rightward force is applied to a book in order to move it across the table with a rightward
acceleration. Construct a free body diagram for the situation. Include frictional forces.
14. A rightward force is applied to a book in order to move it across the table with a constant velocity.
Construct a free body diagram for the situation. Include frictional forces.
15. An applied force of 50 N is used to accelerate an object to the right across a frictional surface. The
object encounters 10 N of friction. Use the diagram to determine the normal force, the net force, the
mass, and the acceleration of the object. (Neglect air resistance.)
Newton’s Second Law
IPC