Cite an instance in which your speed could be zero while your acceleration is nonzero.

Q: If the braking distance for your car at a certain speed is 200ft and, after reacting to a solution,…

A: Acceleration is,

Q: A car travels 40 m in 8.5 s with uniformly de-acceleration to a final velocity of 2.8 m/s. (1) Find…

A: The net force acting on an object is equal to the product of the mass and acceleration of the…

Q: If the value of g changes how does it affect the path of projectile?

A: The gravity affects only the vertical component of velocity.

Q: The magnitude of average velocity is always less than or equal to the average speed. Explain why?

A: Let us assume point A and B and with a straight line joining both of them separated by d distance.

Q: A car is driving 5 m/s and eventually comes to a stop. Which of the statements is correct? * O The…

A: A car is driving at = 5 m/sFinal state = rest Thus, final speed = 0 m/s

Q: A man walks on a straight road from his home to a market 2.5 km away with a speed of 5 the market…

A: Given value--- first speed = 5 km/h . second speed = 7.5 km/h  . distance = 2.5 km. time interval =…

Q: Show that if a particle has zero velocity for any given period of time, then it stands still during…

A: We know that change is position is equal to velocity ×time.

Q: Consider a soccer ball that has been kicked from a witches' cone of height 0.05m. Relative to…

A: Projectile motion :- It is motion in which body moves in 2 dimensional.

Q: You throw a ball upward with an initial speed of 4.5 m>s. Whenit returns to your hand 0.92 s…

A:

Q: Which of the following is false for an object thrown upward X a. Its acceleration is g= -10 m/s…

A:

Q: Can a particle with constant speed be accelerating? What if it has constant velocity? Explain.

A: A particle that moves without any change in velocity will undergo acceleration. One particle that…

Q: A car makes a 60 km trip wvith an average velocity of 40.0 km/h in a direction due north. The trip…

A:

Q: A well hit golf ball is struck off the tee at a speed of 200 mph. If struck at an angle of 45°, how…

A: Given : initial speed of ball = 200 mile/hr              Angle = 45 deg To find : how far ball…

Q: calculate the speed at which the skier arrives

A: Given data; Diagram shows aa ski jump. where,  Skier weigh,m= 60 kgf  It stands at A at the top of…

Q: When velocity and acceleration are both negative, then the speed of the particle is

A: when velocity and acceleration are both negative, they are same in sign.

Q: A ball is projected vertically upward with a speed of 50 m/s. Find (a) the maximum height, (b) the…

A: Given data: Initial velocity , u=50 m/s Acceleration of the ball, a= -g  Final velocity of the ball…

Q: A hunter wishes to cross a river that is 1.5 km wide and flows with a speed of 5.0 km/h parallel to…

A:

Q: a hunter wishes to cross a river that is 2.2 km wide and flows with a speed of 5.0 km/h parallel to…

A:

Q: If the velocity and acceleration of an object are in the same direction, O a. The object remains at…

A: Velocity and Acceleration are in the same direction

Q: A car is moving on a straight line with a variable speed according to the equation v=5t+3 and the…

A: Acceleration is the rate of change video with time.  So to get acceleration we have to differentiate…

Q: A rock is released from rest and falls in the absence of air resistance. Which of the following…

A: Scenario - A rock starts from rest and falls under effect of gravity.

Q: A train is required to run between two stations 3 km apart at a schedule speed of 42 km/h, the du-…

A:

Q: An object will slow down when

A: An object will slow down when it's acceleration is negative i.e it decelerates,  When it's speed…

Q: (a) Find the initial velocity of the ball.                 m/s (b) Find the maximum height the…

A: As the ball is caught by the thrower after 5.00 s.it means displacement of ball after 5.00 s is…

Q: If you are riding on a train that speeds past another train moving in the same direction on an…

A: Relative velocity: The relative velocity of an object is the velocity of the object with respect to…

Q: A ball is thrown downward in the absence of air resistance. After it has been released, which…

A:

Q: The average speed becomes a close approximation to the instantaneous speed when: Select one: O The…

A: The average speed becomes a close approximation to the instantaneous speed when body is moving in an…

Q: a car accelerates uniformly from rest to speed of 40.0 mi/h in 12.0 s. Find (a) the distance the car…

A: Given data The car’s final velocity is v = 40 mi/h. The time taken by the car is dt = 12 s. The…

Q: 20 The velocity of a projectile equals its initial velocity added to : la constant horizontal…

A: When a projectile is thrown up, it's velocity become zero at the highest point of the trajectory .…

Q: Show that a moving particle will move in a straight line if the normal component of its acceleration…

A: Let the particle is initially moving in x-direction.Let a be the acceleration of particle, v be its…

Q: Speed is the magnitude of the velocity. When we say speed is constant, we mean that the magnitude of…

A: The rate of change of velocity is called acceleration.

Q: The average velocity and the instantaneous velocity of an object will be the same if

A:

Q: How could two moving objects travel different distances, but have the same displacement?

A: Remember the definitions of distance and displacements: Distance = total length covered by object in…

Q: Compute for the initial velocity of the car if it attains a velocity of 60 km/h while speeding up at…

A: Given : v = 60 km/h = 60(1000/3600) = 16.67 m/s a = 4.5 m/s2 s = 25 m

Q: Under what situation is an object considered to be "accelerating"?

A: Acceleration of an object is defined as rate of change of its velocity.  When an object experiences…

Q: A heavy ball is thrown straight down from a tower with an initial velocity of 50 m/s. (use g=10 m/s²…

A: Using kinematic equation, the expression for find magnitude of its velocity is v=u+at

Q: How is it technically correct to say that a car making a u-turn can have a constant speed but cannot…

A: Let us first define both physical quantities: Speed: It is defined as distance covered by an object…

Q: A baseball is hit high and far. Which of the following statements is true? At the highest point,(a)…

A: The baseball travels in the projectile motion always. Acceleration in the projectile motion is…

Q: You are going to your hometown by a bus that is moving with constant speed. During the journey, if…

A: If we consider there is no air resistance in the bus then the coin will also move at the same speed…

Q: A car accelerates uniformly from rest to a speed of 35.0 mi/h in 8.0 s. (a) Find the distance the…

A: (a). the distance the car travels during this time is

Q: If the velocity and acceleration of an object are in the opposite directions, O a. The object…

A: Here given the the velocity and acceleration of an object are in the opposite direction. We have to…

Q: Which has zero acceleration? O All of these. None of these. O An object moving at a constant…

A: Here the option ( a) is correct. i .e  All of these.

Q: A 1250 kg helicopter travels in a straight line at a constant speed of 31.0 m/s for exactly 15.0…

A: mass = 1250 kg constant speed = 31 m/s time = 15 minutes ' = 15 * 60 = 900 seconds

Relative Velocity

It is a measurement of an object with regards to the other object which is moving or stable or stationary. For example, if we are traveling in a bus and the bus is moving at speed of 50km/hr, then our speed is according to the nearby passenger on the bus is zero. According to them, we are not moving. But if one person standing on the ground or road observes us from outside of the bus, according to him we are moving at a speed of 50km/hr and the bus is also moving at a speed of 50km/hr. Now, the motion is recognized by the observer, it depends on a frame of reference or observer. This is motion called relative motion.