3. Explain how the block can move with a constant a force applied to it. Is Newt

Question

3. Explain how the block can move with a constant a force applied to it. Is Newton's first lour violated . Approsimately what applied force is needed to keep the block a constant velocity that is twice as large as before? Epl K moving with 5. Suppose that a force F of 3.0 N is applied to the block low the shapes of the acceleration- time and velocity-time g graphs for the block. Time In each situation described below, compare the magnitudes of the two forces. Explain your answer in each case 6. A 90-kg man and a 60-kg boy each have one hand extended out in front and are pushing on each other. Neither is moving. Compare the force ex- erted by the man's hand on the boy's hand to that exerted by the boy's hand on the man's. a. b. In (a), the boy begins to slide along the floor. Now compare the same two forces between their hands.

Explanation / Answer

3. the block moves with a constant velocity even though it has force applied to it, because the force applied onto it is being used to counter the friction force that is acting on the block and hence the net force on the block is 0 and the block moves with constant velocity. Hence newtons law is not beiong violated

4. for the block moving on the friciton table, the friction force is independent of the speed and hence same force is required to keep the block moving at the double the speed.

6. a. as none of them are moving, the net force on each of the individual is 0

also from newtons third law, the force on each individual by the other is the same

b. the force between the hands of two people is still the same from newtons third law as this is an action reaction pair

but as the mass of the boy is lesser thsan the mass of the individual, the friction force on the boy is lesser from the ground and hence he starts to slide on the ground first

Related Questions

Navigate

• Browse (All)
• Browse 3
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.