A 1.2 kg object is moving to the right with a speed of 0.5 m/s when it experienc

Question

A 1.2 kg object is moving to the right with a speed of 0.5 m/s when it experiences the force shown in figure (a) below. What are the object's speed and direction after the force ends?

(b) Answer this question for the force shown in figure (b) below.

http://www.webassign.net/knight/p9-07.gif

A 1.2 kg object is moving to the right with a speed of 0.5 m/s when it experiences the force shown in figure (a) below. What are the object's speed and direction after the force ends? (b) Answer this question for the force shown in figure (b) below.

Explanation / Answer

considering the direction towards right as positive and left as negative

A) in case A

Force = 2N

time = 0.5 s

acceleration = force/mass

= 2/1.2

= 1.66 m/s2

initial velocity u = 0.5m/s

final velocity = u + at

= 0.5 + 1.66 * 0.5

= 1.33 m/s towards right

B) In case B force is applied in oppposite direction

so decceleration = 2/1.2 = -1.66 m/s2

final velocity = u -at

= 0.5 - 1.66*0.5

= -0.33 m/s

final velocity is 0.33 m/s towards left

If direction towards left is taken as positive and right as negative the sign for force reverses and the process remains the same

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

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