Physics, 07.09.2019 00:20 saintsfan2004
Atennis pro throws a tennis ball at a speed of 204 km/hr. a) the tennis racquet contacts the 0.057 kg ball for 0.25 s, therefore what is the average force on the ball?
b) the ball doesn't get slowed down by drag or friction, and the opponent returns the ball at a speed of 80 km/hr. assuming a contact time of 0.25 s, what average force is applied to the ball by the opponent’s racquet?
Answers: 2
Physics, 22.06.2019 04:30
Afeather of mass 0.001 kg falls from a height of 2 m. under realistic conditions, it experiences air resistance. based on what you know about friction, what can you say about the kinetic energy of the feather as it reaches the ground? acceleration due to gravity is g = 9.8 m/s2. a. ke < 0.0196 j b. ke = 00196 j c. je = 0 j d. ke > 0.0196 j
Answers: 1
Physics, 22.06.2019 09:30
This is important. 1. which of the following is an si base unit for measuring length? (2 points) inch gram meter mole 2. which of the following units for distance is an si unit? (2 points) centimeter foot inch yard 3. which of the following tools should a scientist use to measure an object in meters? (2 points) electronic balance pan balance tape measure thermometer
Answers: 2
Atennis pro throws a tennis ball at a speed of 204 km/hr. a) the tennis racquet contacts the 0.057 k...
History, 26.05.2020 11:58
Mathematics, 26.05.2020 11:58
Chemistry, 26.05.2020 11:58
Mathematics, 26.05.2020 11:58
English, 26.05.2020 11:58
Spanish, 26.05.2020 11:58
History, 26.05.2020 11:58
English, 26.05.2020 11:58