Test - Unit 6 Force

Question 1

4. When two forces on the Same object are equal and opposite, these forces are called — forces.

Answer 1

Balanced

Unit 6 concept 1,2 pg 1

Question 2

6. What is acceleration of the box in the picture to the right?

Answer 2

245 N

Unit 6 Concept 1,2 pg 3

Question 3

5. What is the weight of the box in the picture to the right?

Answer 3

12 m/s2

Unit 6 Concept 1,2 pg 4

Question 4

7. Compared to the inertia of a 2.0 kg ball, the inertia of a 4.0 kg ball is?

Answer 4

Twice as great

Unit 6 concept 1,2 pg 1

Question 5

8. Consider a watermelon that starts from rest and is dropped straight down from a tall building. Air resistance can be ignored. Which statement about the watermelon’s motion is false?

Answer 5

The watermelon falls with a constant velocity.

Unit 6 Concept 1,2 pg 3

Question 6

9. A man weighing 800 N is standing on a chair. In order to support the man, what force is the chair exerting?

Answer 6

800 N

Unit 6 Concept 1,2 pg 1

Question 7

10. What is the net force on the block to the right?

Answer 7

2 N left

Unit 6 Concept 1,2 pg 1

Question 8

11. If the block in the picture above has an acceleration of 1 m/s2, what would be the blocks mass?

Answer 8

2 kg

Unit 6 Concept 1,2 pg 3

Question 9

13. An object that is falling freely has a constant what?

Answer 9

Acceleration

Unit 6 Concept 1,2 pg 4

Question 10

14. A student drops a feather and rock at the same time from mrs. Taylor’s window. If air resistance wasn’t a factor, what should she observe?

Answer 10

The rock and feather fall at the same rate

Unit 6 Concept 1,2 pg 1

Question 11

18. If the same force is applied to each of the balls pictured below, wick one will have the least acceleration?

Answer 11

M = 7.3 kg

Unit 6 Concept 1,2 pg 3

Question 12

19. An object in motion with no unbalanced forces acting on it will?

Answer 12

Continue to move in its path at a constant speed

Unit 6 Concept 1,2 pg 1

Question 13

21. The relationship among mass, force, and acceleration is explained by?

Answer 13

Newton’s 2nd law of motion

Unit 6 Concept 1,2 pg 3

Question 14

22. For any object, the greater the force that’s applied to it , the greater it’s — will be?

Answer 14

Acceleration

Unit 6 Concept 1,2 pg 2

Question 15

28. Tendency of an object at resist changes in motion?

Answer 15

Inertia

Unit 6 Concept 1,2 pg 1

Question 16

29. The attraction any two have on one another

Answer 16

Gravity

Unit 6 Concept 1,2 pg 3

Question 17

31. A net force acting on an object causes the object to acceleration in the direction of the net force?

Answer 17

Newton’s 2nd law

Unit 6 Concept 1,2 pg 3

Question 18

32. Related to the amount of force needed to change an objects motion?

Answer 18

Momentum

Unit 6 Concept 1,2 pg 4

Question 19

33. Why does someone not wearing a seat belt in a car fly forward when the car stops suddenly?

Answer 19

Because objects in motion resist a change in motion, due to inertia. 1st law
Unit 6 Concept 1,2 pg 1

Question 20

34. Why does it take more effort to make a bowling ball accelerate 25 m/s2 than to make a tennis ball accelerate 25 m/s2? Make sure to include which law explains this.

Answer 20

Because the bowling ball has more mass thus needs a greater force to accelerate it 2nd law.
Unit 6 Concept 1,2 pg 3