Question
I am studying for a physics exam and this is the pretest. There are some that I don't understand. If someone could help me get to the answer (show all the work so I can look it all over) that would be AMAZING! Thank you very much!
2. A roller coaster, loaded with passengers, has a mass of 2000 kg; the radius of curvature of the track at the bottom point of the dip is 24 m. If the vehicle has a speed of 18 m/s at this point, what force is exerted on the vehicle by the track? A: 4.7 x 10^4 N
5. An Object of mass 0.50 kg is transported to the surface of Planet X where the object's weight is measured to be 20 N. The radius of Planet X is 4.0 x 10^6 m. What is the mass of Planet X? A: 9.6 x 10^24 kg
6. A 3.0 rod is pivoted about its left end. A Force of 6.0 N is applied perpendicular to the rod at a distance of 1.2 m from the pivot causing a clockwise torque, and a force of 5.2 N is applied, at an angle of 30 degrees (between the rod and the force vector) at the end of the rod 3.0 m from the pivot point, causing a clockwise torque. What is the net torque about the pivot? A: -.60 Nm
13. A disk has a moment of inertia of 3.0 x 10^-4 kgm^2, and it rotates with an angular speed of 3.5 rad/sec. What is the magnitude of the net torque must be applied to bring it to rest in 3.0 s? A: 3.5 x 10^-4 Nm
15. A solid sphereof mass 4.0 kg and a radius of 0.12 m is at rest at the top of a ramp inclined 15 degrees. It rolls to the bottom without slipping. The upper end of the ramp is 1.2 m higher than the lower end. What is the linear speed of the sphere when it reaches the bottom of the ramp? A: 4.1 m/s
THANK YOU!!!!
2. A roller coaster, loaded with passengers, has a mass of 2000 kg; the radius of curvature of the track at the bottom point of the dip is 24 m. If the vehicle has a speed of 18 m/s at this point, what force is exerted on the vehicle by the track? A: 4.7 x 10^4 N
5. An Object of mass 0.50 kg is transported to the surface of Planet X where the object's weight is measured to be 20 N. The radius of Planet X is 4.0 x 10^6 m. What is the mass of Planet X? A: 9.6 x 10^24 kg
6. A 3.0 rod is pivoted about its left end. A Force of 6.0 N is applied perpendicular to the rod at a distance of 1.2 m from the pivot causing a clockwise torque, and a force of 5.2 N is applied, at an angle of 30 degrees (between the rod and the force vector) at the end of the rod 3.0 m from the pivot point, causing a clockwise torque. What is the net torque about the pivot? A: -.60 Nm
13. A disk has a moment of inertia of 3.0 x 10^-4 kgm^2, and it rotates with an angular speed of 3.5 rad/sec. What is the magnitude of the net torque must be applied to bring it to rest in 3.0 s? A: 3.5 x 10^-4 Nm
15. A solid sphereof mass 4.0 kg and a radius of 0.12 m is at rest at the top of a ramp inclined 15 degrees. It rolls to the bottom without slipping. The upper end of the ramp is 1.2 m higher than the lower end. What is the linear speed of the sphere when it reaches the bottom of the ramp? A: 4.1 m/s
THANK YOU!!!!
Answers
Related Questions
Which would show that a straight line will be produced on a scatterplot?(1 point) Responses time spe...
Which two quantitative variables would show that a straight line will be produced on a scatterplot?(...
Mr. Lester is offering extra credit on his statistics exam. All students have to do is state how man...
The table below shows the amount of time each of the 15 students in an introductory chemistry class...