# Physics

A 95 kg halfback makes a turn on the football field. The halfback sweeps out a path that is a portion of a circle with a radius og 12 meters. The halfback makes a quarter of a turn around the circle in 2.1 seconds. Determine the speed, acceleration and net force acting upon the halfback

1. 👍
2. 👎
3. 👁
1. v = (2 pi R/4) / 2.1 = pi R/(4.2)

Ac = v^2/R

F = mAc = m v^2/R

1. 👍
2. 👎

## Similar Questions

1. ### Geometry

For every 10 yards on a football field, there is a boldly marked line labeled with the amount of yards. There are two parallel sidelines on each side of the field. If the 50 yard line is perpendicular to one of the sidelines, what

2. ### Math

There is a football field and the length shows 120 yd and the width is 53 1/3 yd a. What are the dimensions of a football field in feet? b. A chalk line is placed around the perimeter of the football field. What is the length of

3. ### physics

a football player runs at 8 m/s and plows into a 80 kg referee standing on the field causing the referee to fly forward at 5 m/s. if this were a perfectly elastic collision, what would the mass of the football player be?

4. ### physics 114

A kicker punts a football from the very center of the field to the sideline 39 yd downfield. What is the magnitude of the net displacement of the ball? (A football field is 55 yd wide.) What is the angle of the net displacement of

1. ### Math

A football field, including the end zones, is 360 feet long and 160 feet wide. How many square yards of artificial grass would be needed to cover the entire field?

2. ### math

A football field is 120 yards long and 53 yards wide. How much fencing is needed to enclose the field?

3. ### Precalculus

The quarterback of a football team releases a pass at a height of 7 feet above the playing field, and the football is caught at a height of 4 feet, 30 yards directly downfield. The pass is released at an angle of 35 degrees with

4. ### physics

A quarterback throws the football to a stationary receiver who is 18.3 m down the field. Football is thrown at an angle of 44.9 degrees to the ground. Acceleration is 9.81 m/s2. What initial spped must the quarterback throw ball

1. ### math

Question: A football team lost 9 yards on its first play. On the next two plays they gained 3 yards and then 6 yards. A. What expression can be written to represent how many yards the football team is from where it started?

2. ### Physics.

A punter kicks a football at an angle of 45 degrees to the ground. The football has an initial velocity of 25 m/s, make a diagram and calculate: a) How long was the football in the air? b) How far does the football travel

3. ### math

A football field is 72 yardsyards long and 46 yards wide what is the area of the field in squ are yards

4. ### estraellamountaincommunity college

an American football field is a rectangle with a perimeter of 1040 feet the Lenght is 200 feet more than the width find the demensionof the field