A 12000 kg boat is moving 4.25 m/s. Its engine pushes 9200 N forward, but the current pushes back at 12,500 N. How much times does it take the boat to stop?

An 835 kg dragster accelerates from rest to 110 km/h in 0.90 seconds. a. what is the change in momentum of the car? b. what is the average force exerted on the car? c. what exerts that force?

A new electric car makes use of storage batteries as it source of energy. Its mass is 1300kg and it is powered 26 batteries, each 12v, 52 A-h.

The pilot of an airplane traveling 180km/h wants to drop supplies to flood victims isolated on a patch of land 160 m below. The supplies should be dropped how many seconds before the plane is directly overhead?

An object is thrown directly up (positive direction) with a velocity (vo) of 20.0 m/s and do = 0. how high does it rise (v = 0 cm/s at top of rise). remember, acceleration is - 9.80 m/s2.

Blood entering the lungs exchanges for oxygen

The voltage across the primary winding is 350,000 V, and the voltage across the secondary winding is 17,500 V. If the secondary winding has 600 coils, how many coils are in the primary winding? 30 583 12000 332500

A 200 watt t. v. is used for 20 hours in a week. If it is used for four weeks then what is cost of electricity if rate is 5rs/kwh

In an experiment, the control is never changed by the scientist not important to the scientist not recorded by the scientist changed by the scientist

When you catch a baseball, what kind of work do you do, negative or positive? by catching the ball, what do you change? what energy does it gain or lose?

All describe work except A) a team of dogs dragging a sled B) a jokey sitting on a horse C) a bowler lifting a bowling ball