1. a car is traveling 60 miles per hours on cruise control. what is the net force? 2. an object of mass 10kg is accelerated upward at 2m/s^2. what force is required? 3. what is the mass of an object if a force of 17n causes it to accelerate at 1.5m/s/s?

Solution: (a) The net force is zero because car is travelling with same speed that is 60 miles per hour or there is no acceleration.

(b) Mass of object is 10 kg

Acceleration is 2 m/s², thus force can be calculated as follows:

F=m×a

Here, m is mass of object and a is its acceleration thus,

F=10 kg×2 m/s²

=20 kg m/s²

Here, 1 N=1 kg m/s²

Thus, F=20 N

(c) Force on object is 17 N and its acceleration is 1.5 m/s².

Mass of the object can be calculated as follows:

m=\frac{F}{a}

thus,

m=\frac{17 N}{1.5 m/s^{2}}=11.33 (\frac{N}{m/s^{2}})

Here, 1 N=1 kg m/s²

Thus,

m=11.33 kg

the law of conservation of mass states that in a chemical reaction, the total mass of reactants is equal to the total mass of products. because atoms are only rearranged in a chemical reaction, there must be the same number of sodium atoms and chlorine atoms in both the reactants and products