Mechanics | Relativity Answers

Stan does 171 J of work lifting himself
0.4 m.
What is Stan’s mass? The acceleration of
gravity is 9.8 m/s2 .
Answer in units of kg

A 200kg crate rests on the floor. How much work is done to move it down at a constant speed 6 meters across the floor when applied force is 300N?

a swinging pendulum eventually comes to rest is this violation of law of conservation of energy

mountain roads rarely go straight up the slope but wind up gradually explain why

what happens to potential energy that an elevator loses coming down from top of building to a stop at the ground floor

From t = 0 to t = 4.70 min, a man stands still, and from t = 4.70 min to t = 9.40 min, he walks briskly in a straight line at a constant speed of 2.95 m/s. What is his vavg in the time interval 2.00 min to 6.70 min?

A car travels at 40 km/h for 50 minutes, then at 90 km/h for 6.0 km. what is the average velocity?

A 29000 kg sailboat experiences an eastward force 20600 N due to the tide pushing its hull while the wind pushes the sails with a force of 87400 N directed toward the northwest (45 westward of North or 45 northward of West). What is the magnitude of the resultant acceleration of the sailboat?

A train starts from rest from a station with acce.02m/s2 on a straight track and than comes tto rest after attaining maximum velocity on another station due to retardation of 0.4m/s2 .if total time spent is half an hour ,than distance between two station is

What is the frictional force on a body by air which is falling through air at an acceleration of 9.2m/s^2? (mass=0.25kg and g=9.8)