The net force applied to it is 6311.9 N.
To calculate the net force to the car, first, we need to find the acceleration using the equation of motion.
Force: This as be defined as the product of mass and acceleration of a body. The S.I unit of force is Newton (N)
⇒ Formula
- S = ut+at²/2................. Equation 1
⇒ Where:
- u = Initial velocity
- S = Distance
- t = Time
- a = acceleration
From the question,
⇒Given:
- S = 40 m
- t = 3.0 s
- u = 0 m/s (at rest)
⇒ Substitute these values into equation 1
⇒ Solve for a
- 9a = 80
- a = 80/9
- a = 8.89 m/s²
⇒ To get the force, we use the formula below
- F = ma .................... Equation 2
⇒ Where:
- F = Force applied
- m = mass of the car
⇒ Given:
⇒ Substitute these values into equation 2
Hence the net force applied to it is 6311.9 N.
Learn more about force here: brainly.com/question/13370981
Answer:
Increase
Explanation:
The acceleration will increase more if all the friction were removed from ramp.
Acceleration is the rate of change of velocity with time.
Frictional force is a force that opposes motion of a body.
- A large friction will reduce the velocity of a body significantly and bring it to stop, a state of no acceleration.
- When friction is removed, the acceleration of a body will increase significantly since the velocity will change rapidly.
- At each turn of time, the velocity keeps increasing due to absence of the inhibiting force of friction.
Answer:
A. Speed is a scalar quantity and velocity is a vector quantity.
Explanation:
A scalar quantity is one that consists of only a numerical value.
Speed is a scalar quantity because only the instantaneous value is indicated, for example the speedometer of a car that tells you your speed at the moment but not where you are going or in what direction are you going.
On the other hand, velocity is a vector quantity. Because it is composed of a <u>magnitude and a direction</u>, for example 10m/s to the south is a velocity, and 10m/s is a speed.
Answer:
speed is increasing.
this is because the graph has a positive slope (due to it going up ), if it were decreasing, the graph would be going down
