Ahiker travels south along a straight line path for 1.5 hours with an average velocity of 0.75 km/hr, then travels south for 2.5 hours with an average velocity of 0.90 km/hr. what is the hiker's displacement for the total trip?

Avery hard rubber ball (m = 0.5 kg) is falling vertically at 4 m/s just before it bounces on the floor. the ball rebounds back at essentially the same speed. if the collision with the floor lasts 0.05 s, what is the average force exerted by the floor on the ball?

Atank is filled with an ideal gas at 400 k and pressure of 1.00 atm . part a the tank is heated until the pressure of the gas in the tank doubles. what is the temperature of the gas?

Anika asks eva to roll a basketball and then a bowling ball to her. which requires more force to roll, and why?