- #1
AlKaiser
- 3
- 0
1. The problem statement:
A 98 kg man lying on a surface of negligible friction shoves a 86 g stone away from himself, giving it a speed of 4.5 m/s. What speed does the man acquire as a result?
2. Homework Equations :
Pi = Pf
M1V1 + M2V2 = M1V1 + M2V2
3. The Attempt at a Solution :
I've tried the formula above, and I got this far:
98 x 0 + 0.086 x 0 = 98 x X + 0.086 x 4.5
0 = 98X + 0.387
-0.387 = 98X
-0.387/98 = X
X = -0.00394897959 m/s
That's what I got. I have a feeling that I've done something wrong. The online Assignment system is telling me my answer is wrong, so what am I doing wrong? Have I missed something? All help is greatly appreciated :D
A 98 kg man lying on a surface of negligible friction shoves a 86 g stone away from himself, giving it a speed of 4.5 m/s. What speed does the man acquire as a result?
2. Homework Equations :
Pi = Pf
M1V1 + M2V2 = M1V1 + M2V2
3. The Attempt at a Solution :
I've tried the formula above, and I got this far:
98 x 0 + 0.086 x 0 = 98 x X + 0.086 x 4.5
0 = 98X + 0.387
-0.387 = 98X
-0.387/98 = X
X = -0.00394897959 m/s
That's what I got. I have a feeling that I've done something wrong. The online Assignment system is telling me my answer is wrong, so what am I doing wrong? Have I missed something? All help is greatly appreciated :D