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An electric vehicle starts from rest and accelerates at a rate of 1.7 m/s2 in a straight line until it reaches a speed of 27 m/s. The vehicle then slows at a constant rate of 1.0 m/s2 until it stops. (a) How much time elapses from start to stop? (b) How far does the vehicle move from start to stop?
Calculate the force required to move an object.
A railroad car of mass 4.0 * 10^4 kg moving at 5.0 m/s collides and couples with two coupled railroad cars, each of the same mass as the single car and moving in the same direction at 1.50 m/s.
On Mars, where air resistance is negligible, an astronaut drops a rock from a cliff and notes that the rock falls about d meters during the first t seconds of its fall. Assuming the rock does not hit the ground first, how far will it fall during t..
A 3.0 block of wood sits on a table. A 3 bullet, fired horizontally at a speed of 440, goes completely by the block, emerging at a speed of 180.What is the speed of the block immediately after the bullet exits.
The sun is more massive than the moon, but the sun is farther from the earth. Which one exerts a greater gravitational force on a person standing on earth? Give the answer by determining the ratio Fsun/ Fmoon of magnitudes of gravitational forces.
What is magnitude of the gravitational attraction
After the collision, the 2.00-kg object has a velocity 5.00 m/s to the west. How much kinetic energy was lost throughout the collision.
An air-track glider attached to a spring oscillates between the 15 {rm cm} marks and the 57 {rm cm} mark on the track. The glider completes 10 oscillations in 32 {rm s}.
A highway is to be built between two towns, one of which lies 36.0 km south and 88.0 km west of the other. What is the shortest length of highway that can be built between the two towns, and at what angle would this highway be directed? length km..
A potential difference of 81 mV exists between the inner and outer surfaces of a cell membrane. The inner surface is negative relative to the outer surface. How much work is required to eject a positive sodium ion (Na+) from the interior of the ce..
An electric field of 120000 N/C points due west at a certain spot. What is the magnitude of force that acts on a charge of -7.8C at this spot.
What is the magnitude of the apparent weight of a 66 astronaut 4500 from the center of Earth's Moon in a space vehicle moving at constant velocity?
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