With reference to Figure-1, a ball A of mass m = 1 kg rolls down a frictionless track of radius R in the vertical plane. The ball starts rolling at position-1, the highest point of the track, with zero initial velocity. At the bottom of the track (position-2) the ball hits a massless spring, of spring constant k = 1980 N/m, that is held in place by a wall. In the process, the spring compresses a maximum of 10 cm where the ball comes to a stop. Neglect the rotational motion of the ball and consider it as a particle. (a) Find the radius of the track. (b) What is the change in potential energy of the ball? (C) What is the velocity of the ball at position-2? Specify both magnitude and direction. (d) If the mass m were doubled by how much would the spring compress? Ball 1 R Wall 77000 2 Figure-1​

the answer is ampere

the ampere is used to measure electricity. an ampere is a unit of electric current equal. a unit of measure for the flow of current in a circuit. one ampere is the amount of current flow provided when one volt of electrical pressure is applied against one ohm of resistance.

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

                                              ⇒      

here   k is the proportionality constant whose value is 1.

                                                            [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2