Askateboarder traveling at 7.0 meters per second rolls to a stop at the top of a ramp in 3.0 seconds. what is the skateboarderâs acceleration?

By definition, acceleration is the change in velocity per unit time. In the given problem, the initial velocity is 7 m/s. Since the statement says that it comes to a stop, the final velocity becomes zero. The time elapsed is 3 seconds. Using the equation for acceleration, we substitute the values to solve for a:

a = (v,final - v,initial)/t
a = (0 - 7)/3
a = -2.33 m/s²

B) raising the temperature and reducing the volume of the gas.|-/ 

Answer: a charge of -1.0  × 10⁻⁴ c must be placed  at x = 26 m.the sign of the charge will be the same sign as the  -4.0  µc charge.======electricstatic force between two point charges  is given by    where k is coulomb's constant,  8.99×10⁹  n·m²/c², q₁ and q₂ are the point charges, and r is the distance between the two point charges.assign positive to q₁let q₁ =  6.0 µc, q₂ = -4.0  µc, q₀ represent the charge at the origin, and q₃ represent this new charge to place.the charge at the origin q₀ would experience the following force f₀₁ from q₁, with r = 6.0 m (note that 1  µc = 10⁻⁶ c)    the force from q₂    the force from q₃    the net force on the origin charge, q₀, has to be zero for no electrostatic forcehaving an equation where k and q₀ can be divided out of the equation will allow us to solve for q₃    isolating:     a charge of -1.0  × 10⁻⁴ c must be placed  at x = 26 m.the sign of the charge will be the same as the  -4.0  µc charge