I cant figure this thing out, I used the formula a=(change in distance)/(change

Question

I cant figure this thing out, I used the formula a=(change in distance)/(change in time) and it came out to be 3=10/t, getting 3.3 but this is false.

Constants person exerts a force of 180 N on pulls a sled across a very smooth surface. The rope is oriented 37° above the horizontal. The sled has a total mass of 48 kg. The sled starts at rest and moves for 10 m. a rope that Part D Determine the time taken for the sled to move 10 m. Express your answer to two significant figures and include the appropriate units SubmitPre Previous Answers Request Answer X Incorrect, One attempt remaining; Try Again Part E Determine the speed of the sled after moving for 10 m. Express your answer to two significant figures and include the appropriate units Vaue Units Submit st Answer

Explanation / Answer

Determine the acceleration of the sled
Fy = F*sin37° = 180*0.6 = 108N
Fx = F+cos 37° = 180*0.8 = 144 N
weight Fw = m*g = 48*10 = 480 N
normal force N = Fw-Fy = 480-108 = 372 N (normal force exerted by surface on sled).

accelerating force Fa = Fx-N* = 144-372*0 = 228 N (very smooth surface means = 0)
acceleration a = Fa/m = 228/48 = 4.75 m/sec^2

Determine the normal force exerted by the surface on the sled.
N = 492 N (no friction since surface is very smooth)

Determine the time taken for the sled to move 10 m
t = 2d/a = 20/2.75 = 2.696sec

Determine the speed of the sled after moving for 10 m
V = a*t = 2.696*2.75 = 7.414 m/sec

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

---

---

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