Day 4 - Circular Motion

Question 1

It is the force that pushes inwards toward the center

Answer 1

Centripetal Force

Question 2

It is the fictitious force that pushes outward

Answer 2

Centrifugal

Question 3

It moves in circle at a constant speed

Answer 3

Circular motion

Question 4

Magnitude remains constant while the direction is?

Answer 4

Constantly changing

Question 5

Over its last revolution before release, a hammer carves a circle of radius 1.4m in 0.45s. Assume that the last revolution is in constant speed
What is the speed of the hammer? Magnitude of the centripetal acceleration? acceleration in grams?

Answer 5

v= 19.5477m/s 
a= 272.94m/s^2
a= 27.85g

Question 6

A 900kg car moving at 10m/s takes a turn around a circle with a radius of 25.0m. Determine the acceleration and the net force acting upon the car.

Answer 6

a= 4m/s^2

Fnet=3600N

Question 7

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 of 12m. The halfback makes a quarter of a turn around the circle in 2.1s. Determine the speed, acceleration and net force acting upon the halfback.

Answer 7

v = 8.97m/s
a = 6.71m/s^2
Fnet= 637 N