2. Use physics terms to explain the benefits of crumple zones in modern cars.

Estimate the change in gravitational potential energy when a person with mass 80 kg rise from bed to a standing position. Assuming that the center of mass of a person is elevated by approximately Δh=0.50m.

Michelson calculated the speed of light using a. windspeed b. prisms c. mirrors d. stars

Change 6 revolutions per minute to a linear speed measured in m/s. The radius is 3 m.

A stationary object has no forces acting on it?

How much force is needed to accelerate a 1000-kg car at a rate of 3 m/s2

What do you call a drug that increases speed

2. How is frequency described in mathematical terms?

During a summer with little rainfall, your house on a hill slope experiences an interval during which your well runs dry. You have to borrow water from your neighbor who lives downslope from you. Why does your neighbor have water when you don't?

If a force does not act parallel to the resulting displacement, what is the effect on the work done by the force?

A stick is a connection of two same - diameter metal rod 5 cm, and a length of both stick is 0,6m. The thermal conductivity of the first rod 92 cal / s. m.°C, and the second stick 50 cal / s. m.°C.