A uniform ladder weighs 20 lb. The vertical wall is smooth (no friction). The floor is rough and μs = 0.8. If the force P is causing tipping of the ladder, what is the normal force on the ladder at point B?

Your target variable is δf, the magnitude of the difference in frequency between the waves emitted from the sonar device and the waves received by the device after reflecting off the whale. write an expression for δf in terms of the relevant frequencies using the subscript notation introduced above.

According to newtons universal law of gravitation, which would change the parh of the ball so it traces out widest curved path possible?

When a bicycle coasts uphill, it moves slower and slower as it climbs. why? a. its kinetic energy is transforming into heat energy. b. its potential energy is transforming into kinetic energy. c. its kinetic energy is transforming into potential energy and heat energy. d. its potential energy is transforming into kinetic energy and heat energy.