In terms of newton's first law ( the law of inertia), how does a car headrest help to guard against whiplash in a rear- end collision?

Q: What force will change the velocity of a body of mass 1000 kg form 120km/h to 130 km/h in Iminute A.…

A: Given:mass m=1000kginitial velocity=120km/h=33.33m/s......(1km/h=518 m/s)final…

Q: If the net force acting on a sliding block is somehow tripled, by how much does the acceleration…

A: Write the expression for acceleration,

Q: Give the magnitude and direction of the net force acting on a) a drop of rain falling down with a…

A: Here given a drop of rain falling with a constant speed . We have to find the magnitude and…

Q: A rock is suspended from a string; and it accelerates upward. Which statement is true concerning the…

A: The net force is given by the Newton's second law.  Net force = mass x acceleration

Q: The equilibrium rule, Σ F = 0, which means “the sum of all the forces is equal to zero”, applies to…

A: The equilibrium rule, Σ F = 0, it state that the sum of all the forces is equal to zero or we can…

Q: When a car suddenly starts from rest, the passengers due to their inertia. O a. stay still O b. fall…

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Q: If the forces that act on a cannonball and the recoiling cannon from which it is fired are equal in…

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Q: The Newton’s third law is applicable when: [A] bodies are at rest [B] bodies are in motion [C]…

A: Newton’s third law of motion: It states that the equal reaction is produced by any action. Example:…

Q: A racing car and a moving van are both traveling at 40 km/h. Which of the two vehicles will require…

A: Given, a racing car and a moving van are both travelling at an initial speed, v1=40 km/h. and,…

Q: What is the deceleration of the rocket sled if it comes to rest in 1.1 s from a speed of 1000 km/h?…

A: initial velocity, u =1000 km/h =277.8 m/s time, t = 1.1 s final velocity, v = 0 m/s

Q: A rider in a "barrel of fun" finds herself stuck with her back to the wall. Which diagram correctly…

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Q: When a car accelerates on a horizontal road, the push of the road on the car is _______ the push of…

A: According to the Newton's third law, To every action, there is an equal and opposite reaction.

Q: "Objects at rest remain at rest; objects in motion remain at constant velocity unless they…

A: Newton's first law of motion states that- 'an object at rest will remain to be at it's state of rest…

Q: On applying retarding force the velocity of a car becomes half after a displacement of 24m. The…

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Q: Is acceleration directly proportional to mass or inversely proportional to mass? Give an example?

A: According to Newton’s 2nd law of motion, force is represented as directly proportional to the mass…

Q: Using Newton's First Law, explain why, in a frictionless environment, a cat that is under motion…

A: Using Newton's First Law, explain why, in a frictionless environment, a cat that is under motion…

Q: Different materials, A, B, C, and D, rest on a table. a. From greatest to least, rank them by how…

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Q: Of Newton's laws, the law of inertia, the law of motion, and the law of action-reaction, why would…

A: Newton's first law states, a body in a state of rest(or motion) continues to remain so, unless an…

Q: an object with a mass of 5.0 kg accelerates 8.0 m/s^2 when an unknown force is applied to it. what…

A: From Newton 2nd law we know,  Force(F) = mass(m) × acceleration(a)

Q: Which model would represent Newton's law of action-reaction? A. A toy car rolling down a ramp B. A…

A: In this problem, it is asking about to Newton's law of action-reaction.

Q: Which of the following situation applies Newton’s Second Law of Motion? * Pushing a shopping…

A: Pushing a shopping cart is only option correct for Newton's 2nd law.  Because apply force to pushing…

Q: Which of the following is an example of Newton’s 1st Law of Motion. * A rock at rest Rocket launch…

A: Introduction: Newton's first law is the law of inertia, which states that if an object is at rest or…

Q: Consider the friction on the inclined plane to determine the following after the blocks are released…

A: Given:- mA=10 kg mB=35 kg μk=0.15θ=25° Find:-  A. Acceleration of the blocks (m/s2 with two decimal…

Q: What are some differences between the forces acting on a person when they are doing a squat vs a…

A: SQUAT:- Squatting is a popular exercise that targets the muscles in the legs, lower back, and core.…

Q: A small sports car collides head-on with a massive truck. The greater impact force (in magnitude)…

A: Sports car is small and truck is massive that means mass of car is small then truck. .

Q: What is a practical example of how a body can still accelerate even without changing its speed?

A: Concept :- When a body of mass m moves in a circular path of radius r with uniform speed v then the…

Q: Two masses are suspended by a frictionless cord (as shown in the figure). Where m1 = 30 kg, and m2 =…

A: m1= 30 kg  m2 = 28 kg

Q: Why would a truck take longer to accelerate when the driver hits the gas if it were loaded with…

A: From Newton's second laws, Force = mass × acceleration  So, for a given force , greater the mass ,…

Q: Why can we neglect forces such as those holding a body together when we apply Newton’s second law?

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Q: Why does a heavy parachutist fall faster than a lighter parachutist who wears a parachute of the…

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Q: If there is friction, why do object/motion accelerates and some remain stationary?

A: Defination Friction is always opposes the relative motion of object  Friction always work in the…

Q: A driver in a saloon car with narrow tyres finds himself in a sandy  environment, what should he do…

A: If a driver in a saloon car with narrow tyres finds himself in a sandy environment, driver should…

Q: Rank the automobiles based on the magnitude of the force needed to stop them, from largest to…

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Q: If the mass of the sliding block is somehow tripled at the same time the net force on it is tripled,…

A: Using the Newton’s second law of motion, write the expression for net force of the first case.

Q: Why a ball rolling across the floor does slows to a stop? a. The force that started it moving wears…

A: A ball rolling across the floor does slows to a stop because of a set of force acting on it, i.e.,…

Q: Your empty hand is not hurt when it bangs lightly against a wall. Why does it hurt if you are…

A: From newton's 2nd law we have,

Q: If an object is at rest, it will remain at rest unless an external force makes it move. Which of…

A: Given The object is at rest.

Q: What does Newton's Law of Inertia State? (1st Law). O Object in motion stays in motion. Object at…

A: ⇒Newton's 1st Law is also known by other name, that is "Law of inertia".

Q: friend tells you that since his car is at rest, there are no forces acting on it. How would you…

A: Given:Friend tells you that since his car is at rest, there are no forces acting on it.Now,Explain:I…

Q: The velocity of a body of mass 20 kg increases from 5 m/s to 20 m/s in a distance of 100 m. The…

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