# Physics

posted by Shannon

Starting from rest, a 98-kg firefighter slides down a fire pole. The average frictional force everted on him by the pole has a magnitude of 720 N, and his speed at the bottom of the pole is 3.8 m/s. How far did he slide down the pole?

1. Nick

You need to make a delta Y chart...

Y= unknown (?)
Vi= 0m/s (because he is starting from rest)
Vf=3.8m/s (bottom of pole)
a= found by using a=Fnet/mass equation below=7.34m/s
t= not needed

a=Fnet (720)/mass (98kg)= 7.34 m/s

To find how far he slid down the pole, you must use the Kinematic Equation that doesn't include time (Vf^2=Vi^2+2a(Y))--> 3.8^2=0^2+(2x7.34)(Y)-->14.44/14.68=14.68(Y)/14.68--> The pole 0.98 meters (3.2 feet)

2. WFSSD

SZDCCAS

## Similar Questions

1. ### physics

The alarm at a fire station rings and a 87-kg fireman, starting from rest, slides down a pole to the floor below (a distance of 3.9 m). Just before landing, his speed is 1.3 m/s. What is the magnitude of the kinetic frictional force …
2. ### physics

The alarm at a fire station rings and a 87-kg fireman, starting from rest, slides down a pole to the floor below (a distance of 3.9 m). Just before landing, his speed is 1.3 m/s. What is the magnitude of the kinetic frictional force …
3. ### physics

A 84-kg fireman slides down a 4-m pole by applying a frictional force of 416 N against the pole with his hands. If he slides from rest, how fast is he moving once he reaches the ground?
4. ### physics 231

A 84-kg fireman slides down a 4-m pole by applying a frictional force of 416 N against the pole with his hands. If he slides from rest, how fast is he moving once he reaches the ground?
5. ### physics

The alarm at a fire station rings and a 83-kg fireman, starting from rest, slides down a pole to the floor below (a distance of 3.9 m). Just before landing, his speed is 1.3 m/s. What is the magnitude of the kinetic frictional force …
6. ### Physics

Starting from rest, a 98-kg firefighter slides down a fire pole. The average frictional force everted on him by the pole has a magnitude of 700 N, and his speed at the bottom of the pole is 3.4 m/s. How far did he slide down the pole?
7. ### Physics

The alarm at a fire station rings and a 98.5-kg fireman, starting from rest, slides down a pole to the floor below (a distance of 4.00 m). Just before landing, his speed is 1.81 m/s. What is the magnitude of the kinetic frictional …
8. ### Physics

An 83-kg fireman slides down a fire pole. He holds the pole, which exerts 500-N steady resistive force on the fireman. At the bottom he slows to a stop in 0.49 m by bending his knees. Determine the acceleration of the fireman while …
9. ### Physics

A 69.6 kg fire fighter slides down a pole while a constant frictional force of 263 N retards his motion. A horizontal 18.7 kg platform is supported by a spring at the bottom of the pole to cushion the fall. The fire fighter starts …
10. ### physics

Starting from rest, a 93-kg firefighter slides down a fire pole. The average frictional force everted on him by the pole has a magnitude of 710 N, and his speed at the bottom of the pole is 3.2 m/s. How far did he slide down the pole?

More Similar Questions