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Q1. Kathy Kool buys a sports car that can accelerate at the rate of4.21 m/s2. She decides to test the car by racing with another speedster, Stan Speedy. Bothstart from rest, but experienced Stan leaves the starting line .68 s before Kathy. Stan moves with a constant acceleration of3.14 m/s2, and Kathy maintains an acceleration of 4.21m/s2.
(a) Find time it takes Kathy to overtake Stan.(b) Find distance she travels before she catches him.(c) Find speeds of both cars at the instant she overtakes him.
Q2. An airplane is flying with a velocity of 93at an angle of 25 above the horizontal. When the plane is a distance 103 directly above a dog that is standing on level ground, a suitcase drops out of the luggage compartment.
An electric scooter has a battery capable of supplying 140 Wh of energy. If friction forces and other losses account for 60 percent of the energy usage, what altitude change can a rider achieve while driving in hilly terrain, if the rider and scooter..
A car travelling at 23 m/s runs out of gas while travelling up a 20 degree slope. How far up the hill will it coast before starting to roll back down.
What happens in the table as to the potential energies
I once observed a woman on an airplane at night with a camera. As we flew low over Washington DC she was impressed with the view of the city lights in the dark. She stood back in the aisle and tried to take the picture by the window using her flash. ..
The parallel metal plate of a capacitor is detached by a distance of 0.5cm and is connected to a 90v battery. Find the electric field between them and surface charge density on the plate.
Suppose the space shuttle is in orbit 460km from the Earth's surface, and circles the Earth about once every 93.80 minutes. Find the centripetal acceleration of the space shuttle in its orbit. Express your answer in terms of g, gravitational accelera..
A pendulum consists of a 4.98kg mass on the end of a 0.873 m string. The mass is pulled aside so the string makes an initial angle with the vertical of 12.5o. The mass is then released with initial speed of 2.10m/s upward and perpendicular to the rop..
What is magnitude of the difference in frequency
What is sign and magnitude of charge
What is the electric potential energy of three equal positive charges of 1.33 µC while they are arranged to form a triangle 2.10 x 10-3 m on a side.
At one instant a bicyclist is 50 m due east of a park's flagpole, going due south with a speed of 9 m/s. Then, 24 s later, the cyclist is 45 m due north of the flagpole, going due east with a speed of 20 m/s. For the cyclist in this 24 s interval,..
A certain car battery with a 14.0 V emf has an initial charge of 195 A•h. Assuming that the potential across the terminals stays constant until the battery is completely discharged, for how long in hours can it deliver energy at the rate of 184 W.
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