Physics Force & Laws Of Motion Level: Misc Level
When a car, moving at velocity v, collides with a light volley ball, initially at rest, the ball bounces off with a velocity of approximately: 2 v, -v ,v, 1.5 v, v /2
Physics Force & Laws Of Motion Level: Misc Level
A 75- kg passenger riding in an automobile is involved in a 20.0 m /s head -on collision with a concrete barrier. The stopping time is 100 milliseconds. What is the force exerted by the seat belt and shoulder strap on the passenger?
Physics Force & Laws Of Motion Level: Misc Level
Two wads of putty are propelled directly toward each other in the horizontal plane.Wad -1 has a mass of 5.00 kg and is traveling at 21.0 m /s south. Wad -2, which is 6.00 kg, is moving at 12.0 m /s north. They collide and stick together. What is the velocity of the joint mass of putty?
Physics Force & Laws Of Motion Level: Misc Level
While floating in space a 100- kg robot throws a 0.800 kg wrench at 12.0 m /s toward his /her partner working on the spaceship. How fast will the robot move away from the ship?
Physics Force & Laws Of Motion Level: Misc Level
A) How much energy is required to stop a 3200 Ib car traveling at 60 mi /hr?
B) If this is accomplished in 10 seconds, how much power is expended?
Physics Force & Laws Of Motion Level: Misc Level
A 0.25 kg ball moving horizontally at 10 m /s is hit by a bat which reverses the ball s direction. Its final velocity is 16 m /s. The bat acts on the ball for 0.015 s.Find the average force exerted on the ball by the bat.
Physics Force & Laws Of Motion Level: Misc Level
Identical balls with initial velocities V 1=1.2 m /s and V 2 = -. 75 ( note minus sign) m /s collide head on. If the collision is perfectly elastic, what is the final velocity of each ball?
Physics Force & Laws Of Motion Level: Misc Level
A 70 gram body is projected up a rough incline plane, inclined at an angle of 35 degrees to the horizontal, with an initial velocity of 400 cm /sec. The coefficient of friction between the body and the plane is 1 /2. How far up the plane will the body go?
Physics Force & Laws Of Motion Level: Misc Level
A 1200 Ib sled is pulled along a horizontal surface at uniform speed by means of a rope that makes an angle of 30 degrees above the horizontal. If the tension, T, in the rope is 100 Ibs, what is the coefficient of friction?
Physics Force & Laws Of Motion Level: Misc Level
A 5 Ib Weight suspended from a 3 ft cord is pulled to one side by a horizontal force F, so that cord makes an angle of 30 degrees with the vertical. What is the value of the force F, and what is the value of T, the tension of the cord?
Physics Force & Laws Of Motion Level: Misc Level
A uniform door, of height 3.50 m and width 1.50 m and weighing 200 N, is supported by two small hinges. The hinges are symmetrically placed, 20 cm from the top and bottom of the door. If the top hinge supports the full weight of the door, find the horizontal force exerted by each hinge on the door.
Physics Force & Laws Of Motion Level: Misc Level
when two masses of unequal masses are hung vertically over a friction-less pulley of negligibly mass from a light string as shown in figure 3, the arrangement is called an Atwood machine.The device is sometimes used in the laboratory to measure the free fall acceleration. Determine the magnitude of the acceleration and the tension in the string for the masses M 1 =4.0 kg and M 2 =2.0 kg.
Physics Force & Laws Of Motion Level: Misc Level
Two blocks of masses M 1=4.0 kg and M 2= 3.0 kg are placed in contact with each other on a friction-less horizontal surface. A constant horizontal force F =9.0 N is applied to the block of mass m. A. Determine the magnitude of the acceleration of the two -block system. B. Determine the Magnitude of the contact force between the blocks.
Physics Force & Laws Of Motion Level: Misc Level
Determine the frictional force exserted by the air on body whose mass is 0.4 kg if it falls with an acceleration of 9.0 m/ s 2.
Physics Force & Laws Of Motion Level: Misc Level
A man whose mass is 90 kg is in an elevator. Determine the force the floor exerts on him when:a the elevator goes up with a uniform speed, b. the elevator goes down with a uniform speed, c.the elevator accelerate upward at 3 m /s2, and d. the elevator accelerates downward at 3 m /s 2 and, e, the cable breaks and elevator falls freely.
