Two boys searching for buried treasure are standing underneath the same tree. One boy walks 18 m east and then 18 m north. The other boy walks 16 m west and then 11 m north. Find the scalar product of their net displacements from the tree
What will be an ideal response?
-90 m2
You might also like to view...
How has Earth's interior remained warm over its geological history?
A. the greenhouse effect B. tidal stresses from the Moon C. Earth's proximity to the Sun D. leftover heat from formation E. radioactive decay
A rod of length L is hinged at one end. The moment of inertia as the rod rotates around that hinge is ML2/3 . Suppose a 2.00-m rod with a mass of 6.00 kg is hinged at one end and is held in a horizontal position. The rod is released as the free end is allowed to fall. What is the angular acceleration as it is released?
a. 1.09 rad/s2 b. 4.50 rad/s2 c. 7.35 rad/s2 d. 0.82 rad/s2 e. 4.90 rad/s2
Which has greater kinetic energy?
A) a car traveling at 30 km/hr B) a car of half the mass traveling at 60 km/hr C) both the same D) need more information
You do 116 J of work while pulling your sister back on a fritctionless swing, whose chain is 5.1m long, until the swing makes an angle of 32.0° with the vertical. What is your sister's mass?
A) 19.0 kg B) 15.3 kg C) 13.0 kg D) 17.6 kg