About 40 J is required to push a crate 4 m across a floor. If the push is in the same direction as the motion of the crate, the force on the crate is about

A) 4 N.
B) 10 N.
C) 40 N.
D) 160 N.


Answer: B

Physics & Space Science

You might also like to view...

An inductor has 200 turns/cm and a cross-sectional area of 1.8 cm2. If its inductance is 32 mH, what is its length?

A. 21 cm B. 15 cm C. 35 cm D. 64 cm E. 72 cm

Physics & Space Science

TE is much smaller for lead than for iron. Which therefore has the greater heat capacity per atom at T = 100 K?

A. Lead B. Iron C. Both should be about the same.

Physics & Space Science

A diffraction grating has 6000. lines per centimeter ruled on it. What is the angular separation between the second and the third orders on the same side of the central order when the grating is illuminated with a beam of light of wavelength 550

nm?

Physics & Space Science

The quantity mvr is an object's

a. inertia. b. torque. c. linear momentum. d. angular momentum.

Physics & Space Science