Physics Force & Laws Of Motion Level: Misc Level
The center of mass of three objects is located at ( 1,0 ).One object with a mass of 5.0 kg is at ( -2, -1 ) and a second object with a mass of 2.0 kg is at ( 0,0 ).Find the coordinates of the third mass of 3.0 kg.
Physics Force & Laws Of Motion Level: Misc Level
A 3 kg bowling ball traveling with a velocity of 3 m /s collides head -on with another bowling ball of the same mass traveling with a velocity of - 2 m /s. If the collision is perfectly elastic, the velocities of the bowling balls after the collision is:
Physics Force & Laws Of Motion Level: Misc Level
A 300 g baseball traveling at 30 m /s is struck by a bat in the direction from which it came at 40 m /s. Find the impulse of the force on the baseball.
Physics Force & Laws Of Motion Level: Misc Level
A 200 g ball hits a wall perpendicularly with a velocity of 30 m/s and rebounds back perpendicularly with a velocity of 20 m /s. If the collision lasts for 5 ms, find the average force exerted by the ball on the wall.
Physics Force & Laws Of Motion Level: Misc Level
A 60 kg boy is coasting along on his 15 kg bike at a velocity of 4 m/s carrying a 10 kg pack. He drops the pack.A) What will happen to the boy /bike system after he loses the pack. B) What is the bike's velocity after the rider drops the pack.
Physics Force & Laws Of Motion Level: Misc Level
A force of 10 N is applied to a 5 kg mass for 2 sec on a frictionless surface. A) What is the velocity of the mass at the end of the acceleration period.
B) What is the kinetic energy of the mass at the end of the acceleration period.
C) The mass comes to a frictionless ramp with an angle of 35 degrees. How far along the length of the ramp will the mass slide before stopping.
Physics Force & Laws Of Motion Level: Misc Level
A small block of mass m = 1.3 kg slides, without friction, along the loop - the- loop track shown. The block starts from the point P a distance h = 53.0 m above the bottom of the loop of radius R =A 20.0 M. what is the kinetic energy of the mass at the point A on the loop ? What is the down ward acceleration of the mass at the point A of the loop?
What is the minimum height h for which the block will reach point A on the loop without leaving the track?
Physics Force & Laws Of Motion Level: Misc Level
A block of mass m = 6.7 kg is released from rest at a height of H =3.0 m on a curved frictionless ramp. At the foot of the ramp is a spring whose spring constant is k =372.0 N/m. What is the maximum compression of the spring, x ?
Physics Force & Laws Of Motion Level: Misc Level
Tarzan plans to cross a gorge by swinging in an arc from a hanging vine. If his arms are capable of exerting a force of 1450 N on the rope, what is the maximum speed he can tolerate at the lowest point of his swing? His mass is 81.4 kg and the vine is 5.95 m long.
Physics Force & Laws Of Motion Level: Misc Level
The frequency of vibration of a mass - spring system is 5.00 Hz when a 4.00 g mass is attached to the spring. What is force constant of the spring?
Physics Force & Laws Of Motion Level: Misc Level
A driver sees a cow in the road ahead and applies the brakes so hard that they lock and the car skids to a stop in 24 m. If the road is concrete and it is dry day, what was the car's speed in kilometers per hour when the brakes were applied?
Physics Force & Laws Of Motion Level: Misc Level
A 365 Ib crate 1. 26 ft high with a squared base 1.00 ft on each side is subjected to a shear force of 25.5 Ib. Find the shear stress on the crate.
Physics Force & Laws Of Motion Level: Misc Level
A 3.0 g bullet traveling at 350 m/s hits a tree and slows down unifomly to a stop while penetrating a distance of 12 cm into the trees trunk. What was the force exerted on the bullet in bringing it to rest.
Physics Force & Laws Of Motion Level: Misc Level
A student could either pull or push, at an angle of 30 degrees from the horizontal, a 50 kg crate on a horizontal surface, where the coefficiant of kinetic friction between the crate and the surface is 0.20. The crates to be moved a horizontal distance of 15 meters. a) compared with pushing, pulling requires the student to do -1) Less 2) the same 3) more work. b) Calculate the minimum work required for both pulling and pushing.
Physics Force & Laws Of Motion Level: Misc Level
On the basis of conservation of angular momentum, discuss why a helicopter have more then one rotor ( or propeller). Discuss two or more ways in which the second rotor (or propeller) can operate in order to keep the body of the helicopter stable.
