A 10 kg box initially at rest is pulled with a 50 N horizontal force for 4 m across a level surface. The force of friction acting on the box is a constant 20 N. How much work is done by the force of friction?

In the equation Δp=m (vf-vi), which quantity is considered to be constant?

A woman who has a mass 50kg is wearing high heel shoes. The area of each heel in contact with the floor is 0.45 cm 2. What is the pressure exerted by the woman on the floor if A. she stands on the 2 heels. B. she stands on 1 heel only.

Which statement describes refrigeration systems? Refrigeration systems add cold air to the inside of a building. Refrigeration systems remove all thermal energy from inside the building.

A 1500 kg car traveling at 15.0 m/s to the south collides with a 4500 kg truck that is at rest at a stopligt. The car comes to a stop but imparts all it's mometum to the truck.

If the Moon's mass increases, the high tide would A. increases B. Decreases C. Stay the same because the gravity ...

Consider a rough asphalt roadway with 17 cm curbs and one 3.75 m lane in each direction and a 1.45 m shoulder on each side. The road has a longitudinal slope of 0.75% and is crowned in the center with a transverse slope of 2.25%.

An example of an opinion would be which of the following? bob s burgers is the best show on television. cake is appropriate for many occasions. earth is 238,900 miles from the moon. none of these

Which is a concern about mining for uranium? -Heated water could be released into the environment. -Dust released in the air could be radioactive. -Supplies could become low during a drought.

In 1986, a gargantuan iceberg broke away from the Ross Ice Shelf in Antarctica. It was approximately a rectangle 160 km long, 40.0 km wide, and 250 m thick. What is the mass of this iceberg, given that the density of ice is 917 kg/m3?

The weight of an astronout is 60kg on earth, find the wight of the same object on the planet where the gravitational attraction has been reduced to 1/10 of the earths pull