The force becomes 1/2 F which is the third choice
F=mv^2/r
If its accel is constant and not changing from its number then the velocity is changing so True
Answer:
b. 5 N
Explanation:
Each book weighs 5 N. Therefore, five books weigh 25 N. The friction force is:
Ff = Fn μ
Ff = (25 N) (0.2)
Ff = 5 N
Inertia is the tendency of an object to stay in motion when it is in motion. This is basically Newton's first law. The person in the car is still in motion when the car crashes and If there's no seatbelt to increase the time of the crash then there will be a larger force.
2. A car traveling at a higher rate of speed will have more kinetic energy than if it were to be traveling at a lower speed. The formula for kinetic energy is (1/2)* mass* velocity^2. Therefore doubling the velocity will affect it by a factor of 4. (4x greater).
3. A driver can slow down before entering the curve as a smaller tangent velocity will affect the centripetal force less.
4. Force= mass* acceleration so if a car has a higher acceleration then there will be a greater force of impact. And this also goes back to question 1 with the seatbelts.