Answer:
Explanation:
The main equation to solve this is F = ma, where F is the force applied to the brakes with respect to its acceleration. We have the mass that we need, but we do not have the acceleration. That's the first thing we have to find. However, our velocity needs to be stated in m/s and right now it's in km/h. Converting that:
Now we're ready to find the acceleration:
where the top line there translates to the final velocity minus the initial velocity.
so the acceleration is -8.3 m/s/s
We can use that now in the force equation above:
F = 1200(-8.3) and
F = -1.0 × 10⁴ N (that's 10,000 N to the correct number of sig dig's; the negative sign means that the force is being applied in the direction opposite to that which the van is currently moving)
Explanation:
It is given that,
Mass of the artillery shell, m = 1100 kg
Acceleration of he shell, 
(a) The magnitude of force exerted on the shell can be calculated using Newton's second law of motion as :
F = ma
F = 26400000 N
or
(b) The magnitude of the force exerted on the ship by the artillery shell will be same but the direction is opposite as per Newton's third law of motion. i.e 
Answer:
0.13A
Explanation:
Given parameters:
Number of batteries = 3
Voltage of each batter = 1.5V
Voltage of the circuit = 3 x 1.5 = 4.5V
Resistance = 35Ω
Unknown:
Current that flows in the circuit = ?
Solution:
According to Ohm's law;
I = 
I is the current
V is the voltage
R is the resistance
Now insert the parameters and solve;
I = 
= 0.13A
Bob is pushing a lawn mower up a hill with the mower
tilting slightly to the right. If we wish to use vectors to determine the total
force acting on the mower. These are the forces that should be considered:
Force pushing the lawnmower <span>
Gravitational force
Weight of the lawnmower pushing against the slope
<span>Counter force of the slope against the lawnmower</span></span>
