Please Show all Work with answer

An Inter City Express Iocomotvie pulls fourteen cars, each with a mass of 53,000 kg. What is the tension in the coupling between the third and forth cars when the acceleration of the train is 0.26 m/s^2?

Acceleration and Force

A 400-kg ice boat moves on runners on essentially frictionless ice. A steady wind blows, applying a constant force to the sail. At the end of an 8.0s run, the acceleration is 0.50 m/s^2. a. What is the acceleration at the beginning of the run? b. What was the force due to the wind? c. What retarding force must be applied at the end of an 4.0s to bring the ice to rest by th end of the next 4s? (The wind is still blowing. Assume the boat was at rest at time t=0.

This is only to get checked!!!

This is how I showed the problem: a=vf-vo/t 0.5=vf-0/4=2 as vf. a=0-2/4=-0.5 F(wind)-F(app.)=m(a) 200-F(app.)=400(-0.5) Answer=400 email: buie144@yahoo.com and tell me if this is right. A 400-kg ice boat moves on runners on essentially frictionless ice. A steady wind blows, applying a constant force to the sail. At the end of an 8.0s run, the acceleration is 0.50 m/s^2. a. What is the acceleration at the beginning of the run? b. What was the force due to the wind? c. What retarding force must be applied at the end of an 4.0s to bring the ice to rest by th end of the next 4s? (The wind is still blowing. Assume the boat was at rest at time t=0.

Cirular Motion

show all work with answer please!!! A protractor is made so that the edge of its scale is 7.5 cm from the center point. If the scale is marked in degrees, how far apart are the marks along the edge?

Circular Motion

show all work with answer please!!! A 12-in. diameter phonograph record rotates about its center by one-quarter turn. a. Through how many radians has it turned? b. How far has a point on the rim moved?