Answer to Question #180131 in Classical Mechanics for Kaitlyn Hosking

Question

1.     The Kilmarnock Campus tug of war team pulls with a force of 400N while the Ayr Campus team pulls with a 300N force.  What is the size of the resultant force and which team wins?

1.     A car (mass 1000kg) engine produces a force of 2000N.  There is a frictional force of 100N acting against the car (air resistance is negligible).  Calculate the resultant force and hence the cars acceleration.

2.     A parachutist and his parachute have a total mass of 100kg. At a certain point air resistance is measured as 400N

a.     Calculate the combined weight?

b.     Determine the resultant force & direction.

c.      Calculate the acceleration.

Answer 1

Answer 1

Resultant force

F=400-300=100N

So Kilmarnock Campus tug of war team will win.

Answer 2

Resultant force

R=2000-100=1900N

Acceleration

$a=\frac{1900}{1000}=1.9m/s^2$

Answer 3

a)

Combine weight

$W=(100\times9.81)=981N$

b) resultant force

$F=981-400=581N (Downward)$

c)

Acceleration

$a=\frac{581}{100}=5.81m/s^2$