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The student describes how she will find the speed of the car at the bottom of the slope.
(i) Explain why the student will not be able to calculate the correct speed using this method.
A rock is thrown horizontally from the top of a building with an initial speed of v = 10.1 m/s. If it lands d = 57.1 m from the base of the building, how high is the building?
Object X
of mass M
travels toward object Y
of mass 2M
in such a way that they collide. The table contains data about the velocities of object X
and object Y
immediately before the collision and immediately after the collision. What are the change in momentum of the two-object system and the change in momentum of each object from immediately before the collision to immediately after the collision?
Two identical spheres of known mass M are attached to opposite ends of a rod of negligible mass. The mass-rod-mass system is spun in the vertical plane and then released so the system falls downward as it rotates, as shown in the figure. Data are collected and shown in the graph of the vertical velocity, v, of the two spheres as a function of time .The positive direction is considered to be downward. A student uses the graph to make three claims. Claim 1: Change in linear momentum of the center of mass of the system from 0.0s to 0.5s can be determined. Claim 2 The average applied force exerted on the center of mass of the system from 0.0s to 0.5s can be determined.Claim 3: The change in the kinetic energy of the system from 0.0s to 0.5s can be determined. Which of the student's claims are correct
Answer A: Claim 1 and claim 2 only
Answer B: Claim 1 and claim 3 only
Answer C: Claim 2 and claim 3 only
D:Claim 1, claim 2, and claim 3
1. Angelo Jogged 10 times in 30 mins around the track with a radius of 50m. find his average speed and average velocity.
a) Leakage current
c) Cut-in or knee voltage
b) Breakdown voltage (Forward and reverse)
d) What are the differences between Ge and Si diode?
For a short time the crane in the figure below lifts the 2.50-Mg beam with a force of F = (28+3s2 )kN. Determine the speed of the beam when it has risen s = 3 m. Also, how much time does it take to attain this height starting from rest? [5]
The bumper cars A and B in Fig. Q5 below each have a mass of 150 kg and are coasting with the velocities shown before they freely collide head on. If no energy is lost during the collision, determine their velocities after collision. [10]
Two smooth disks A and B, having a mass of 1 kg and 2 kg, respectively, collide with the velocities shown in figure below. If the coefficient of restitution for the disks is e = 0.75, determine the x and y components of the final velocity of each disk just after collision. [10]
