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The driver of a 1400 kg car, initially traveling at 12.1 m/s, applies the brakes, bringing the car to rest in a distance of 19.0 m.
(a) Find the net work done on the car.
(b) Find the magnitude and direction of the force that does this work. (Assume this force is constant.)
magnitude
A man is to pull a 50 .0 kg crate across a level terrain with a force of 50.0 N. What is the coefficient of kinetic friction, if the work done by friction is - 4.30 x 102 J
A constant force vector F =(8.0i+9.0j+12.0k)N acts on a small object of mass 95 g. What is the angle between F vector and d vector
Consider the triangle of charges diagrammed below, for which d = 2 cm, q = 2 nC, and the +x-axis points to the right. What is the force on the 1 nC charge? Give your answer as a magnitude and a direction.
Bats are capable of navigating using the earth's field-a plus for an animal that may fly great distances from its roost at night. If, as sleeping during the day, bats are exposed to a field of a equal magnitude but different direction than the earth..
Coil springs are widely used in industry. Those used in scientific instruments must be manufactured to exhibit consistent performance. Calculate the force constant k
A constant force of 50 N is applied tangentially to the rim of a solid disc with a 60 cm radius. The wheel has a moment of inertia of 40 kgm^2. What is the mass of the disc
If the air in the tube is replaced with a different gas, the frequency of the fundamental standing wave changes to 60·Hz. What is the speed of sound in this new gas
A 1.00 kg block Is resting against a light, compressed spring at the bottom of a rough plane inclined at an angle of 30 degrees. Kinetic friction between box and plane is 0.100. Suppose the spring is compressed 10 cm from its equilibrium length.
If the dummy is thrown forward with force of 130.0 N while simultaneously being hit from the side with a force of 4500.0 N, illustrate what force will the sensor report?
A 1360 kg geosynchronous satellite orbits a planet similar to Earth at a radius 1.97 × 105 km from the planet's center. What is the force acting on this satellite
A uniform electric field with a magnitude of 5650 N/C points in the positive x direction. Find the change in electric potential energy when a +15.5-"mu"C charge is moved 4.50 cm in the positive y direction.
You have designed a rocket to be used to sample the local atmosphere for pollution. It is fired vertically with a constant upward acceleration of 18 m/s2. Determine the total time the rocket is in the air
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