A 1000 kg car crashed into bearer. the car changed speed from 30 m/s to 20 m/s in 2 seconds. What force did the bearer apply to stop the car?

Which phase must the moon be in during a solar eclipse? a. full b. new c. first quarter d. third quarter

A straight wire in a magnetic field experiences a force of 0.030 N when the current in the wire is 2.7 A. The current in the wire is changed, and the wire experiences a force of 0.047 N as a result. What is the new current?

Show that the relationship between impulse and the change in momentum is another way of stating Newton's second law of motion.

What contributes to a surface having more friction

Show the equation of simple pendulum to be dimensionally consistent

How are magnetic stripes near mid-ocean ridges evidence for sea-floor spreading?

If a truck has a mass of 2 x 106 grams and a velocity of 35m/s, what is its momentum? kgm/s a. 2 million b. 70 c. 57.14 d. 70,000 e. 57,100

A scientist heats a piece of iron until it is glowing white-hot. he places the metal inside a metal box. he removes all of the air from the inside of the box.

Johanna is studying what happens to the energy as a ball rolls down a ramp. What is she studying? Check all that apply. 1. gravitational potential energy 2. electrical energy 3. kinetic energy 4. mechanical energy 5. elastic potential energy

The density of sugar is 1.59 g/cm3. the mass of a sample is 4.0 g. find the volume of the sample