so after frantically studying for my physics exam with a set of problems assigned by the teacher, i realized i can't do about half of them. This is not good!
any of these you guys can help answer would be amazing
thank you
A ball is thrown upward from the top of a 26.8 m tall building. The ball's initial speed is 12 m/s. At the same instant, a person is running on the ground at a distance of 29.8 m from the building. What must be the average speed of the person if he is to catch the ball at the bottom of the building?
A person looking out the window of a stationary train notices that raindrops are falling vertically down at a speed of 3.5 m/s relative to the ground. When the train moves at a constant velocity, the raindrops make an angle of 38° when they move past the window. How fast is the train moving?
To hoist himself into a tree, a 68.5 kg man ties one end of a nylon rope around his waist and throws the other end over a branch of the tree. He then pulls downward on the free end of the rope with a force of 382 N. Neglect any friction between the rope and the branch, and determine the man's upward acceleration.
A roller coaster at an amusement park has a dip that bottoms out in a vertical circle of radius r. A passenger feels the seat of the car pushing upward on her with a force equal to four times her weight as she goes through the dip. If r = 23.5 m, how fast is the roller coaster traveling at the bottom of the dip?
A computer is reading data from a rotating CD-ROM. At a point that is 0.032 m from the center of the disc, the centripetal acceleration is 115 m/s2. What is the centripetal acceleration at a point that is 0.058 m from the center of the disc?
A pitcher throws a 0.140 kg baseball, and it approaches the bat at a speed of 45.0 m/s. The bat does Wnc = 80.0 J of work on the ball in hitting it. Ignoring air resistance, determine the speed of the ball after the ball leaves the bat and is 25.0 m above the point of impact.
A 56.0 kg. skateboarder starts out with a speed of 1.80 m/s. He does +80.0 J of work on himself by pushing with his feet against the ground. In addition, friction does -265 J of work on him. In both cases, the forces doing the work are nonconservative. The final speed of the skateboarder is 6.15 m/s.
(a) Calculate the change (ΔPE = PEf - PE0) in the gravitational potential energy.
explanations would be fantastic as well
thank you so much!!
any of these you guys can help answer would be amazing
thank you
A ball is thrown upward from the top of a 26.8 m tall building. The ball's initial speed is 12 m/s. At the same instant, a person is running on the ground at a distance of 29.8 m from the building. What must be the average speed of the person if he is to catch the ball at the bottom of the building?
A person looking out the window of a stationary train notices that raindrops are falling vertically down at a speed of 3.5 m/s relative to the ground. When the train moves at a constant velocity, the raindrops make an angle of 38° when they move past the window. How fast is the train moving?
To hoist himself into a tree, a 68.5 kg man ties one end of a nylon rope around his waist and throws the other end over a branch of the tree. He then pulls downward on the free end of the rope with a force of 382 N. Neglect any friction between the rope and the branch, and determine the man's upward acceleration.
A roller coaster at an amusement park has a dip that bottoms out in a vertical circle of radius r. A passenger feels the seat of the car pushing upward on her with a force equal to four times her weight as she goes through the dip. If r = 23.5 m, how fast is the roller coaster traveling at the bottom of the dip?
A computer is reading data from a rotating CD-ROM. At a point that is 0.032 m from the center of the disc, the centripetal acceleration is 115 m/s2. What is the centripetal acceleration at a point that is 0.058 m from the center of the disc?
A pitcher throws a 0.140 kg baseball, and it approaches the bat at a speed of 45.0 m/s. The bat does Wnc = 80.0 J of work on the ball in hitting it. Ignoring air resistance, determine the speed of the ball after the ball leaves the bat and is 25.0 m above the point of impact.
A 56.0 kg. skateboarder starts out with a speed of 1.80 m/s. He does +80.0 J of work on himself by pushing with his feet against the ground. In addition, friction does -265 J of work on him. In both cases, the forces doing the work are nonconservative. The final speed of the skateboarder is 6.15 m/s.
(a) Calculate the change (ΔPE = PEf - PE0) in the gravitational potential energy.
explanations would be fantastic as well
thank you so much!!