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Three charges A(4 µC), B(-6 µC) and C(2 µC) are placed at the vertices of a right angle triangle ABC. AC=10 cm, BC=6 cm. Find net force on charge B due to C and A charges
6. Three point charges are fixed at the corners of a right triangle. What is the electric force on the +1.0-pC chargedue to the other two charges?
Given that the sound intensity 4.0 m from the sound source is 5.0 x 10−6w𝑚−2.
What is the intensity at 2.0 m?
A person has a mass of 70 kg. What is this persons weight? What is the force that this person exerts onto earth? Why is the earths acceleration because of this person?
Astronauts on the first trip to Mars take along a pendulum that
has a period on earth of 1.50 s. The period on Mars turns out to be
2.45 s. What is the free-fall acceleration on Mars?
The surface of a concave mirror is pointed towards a flashlight. Light from the flashlight hits the mirror and converges to a point. How far is this converging point from the mirrors surface if the radius of curvature (C) of the mirror is 250cm?
It is now 8:59 am, but when the bell rings at 9:00 am Suzette will be late for Science class for the third time this week. She must get from one side of the school to the other by hurrying down three different hallways. She runs down the first hallway, a distance of 35.0 m, at a speed of 3.50 m/s. The second hallway is filled with students, and she covers its 48.0 m length at an average speed of 1.20 m/s. The final hallway is empty, and Suzette spring its 60.0 m length at a speed of 5.00 m/s Determine if Suzette makes it to class on time by finding how many seconds she arrives before or after the bell.
Does the change in surface area of an object result in different static and kinetic frictions?
A car moves round a circular track with a uniform speed of 100km/h. Show in a diagram vectors which represents the velocity at four consecutive points A,B,C,D equally spaced round the track.is (A) the velocity and (B) the speed the same at A,B,C,D
(a) Find the value of the moment of inertia of the sphere about its axis of rotation.
(b) What is the magnitude of angular velocity of the sphere when it touches the
inclined plane?
(c) How far along the second inclined plane (45º) on the right will the center of the
sphere travel before it comes to a stop?
