Question

You have found that the force of the wagon is F = 45(cos 15° i + sin 15° j) and the displacement of the wagon is v = 45i. Use the formula for work to find W. W = F · v = (45 cos 15° i + 45 sin 15° j) · (45i) = (45 cos 15° i) · (45i) + (45 sin 15° j) · (45i) = Incorrect: Your answer is incorrect. cos 15° ≈ Incorrect: Your answer is incorrect. ft-lb (rounded to one decimal place)

Answer 1

Answer:

1956.2 ft-lb

Step-by-step explanation:

We are given that force of the wagon

$F=45(cos 15^{\circ}+sin 15^{\circ} J)$

Displacement of the wagon =45 i

We know that

Work done, W=$F\cdot v$

Substitute the values then we get

$W=45(cos 15^{\circ}+sin 15^{\circ} J)\cdot 45i$

$W= 2025 15^{\circ}$

$W=2025\times 0.966$

$w=1956.2 ft- lb$

Hence, Work done on the wagon=1956.2 ft-lb