True or False? (a) A car must always have an acceleration in the same direction as its velocity. (b) It's possible for a slowing car to have a positive acceleration. (c) An object with constant nonzero acceleration can never stop and remain at rest.

Q: A startled armadillo leaps upward, rising 0.586 m in the first 0.204 s. (a) What is its initial…

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Q: A cyclist is coasting up a hill. At t=0, the cyclist has a velocity of 14.5 m/s. a) If the…

A: Given data:  Initial velocity (u) = 14.5 m/s Final velocity (v) = 0 m/s Acceleration (a) = -2.5 m/s2…

Q: From rest, the cheetah can accelerate at 8.8 m/s2 and reach a top speed of 30 m/s (108 km/h)! It can…

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Q: Motion along a Line with Constant Acceleration. A car is speeding up and has an instantaneous…

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Q: Imagine that you are inside a spaceship. At t = 0 s, you are at the ground. Then you take off with a…

A: At time t=0 s, the constant upward acceleration is given as, ay=6 m/s2, The time at which jumped out…

Q: Cite some situations from your everyday experience of constant acceleration.

A: Acceleration is the rate of change of velocity.

Q: In a test run, a certain car accelerates uniformly from zero to 24.0 m/s in 2.95 s. (a) What is the…

A: (a) From kinematics, the expression for the final velocity is:

Q: Two cars are moving in the same direction in parallel lanes along ahighway. At some instant, car A…

A: Acceleration is defined as the rate of change in velocity per unit time.

Q: IT IS POSSIBLE FOR THE SPEED OF AN OBJECT TO BE ZERO AT THE SAME TIME THAT ITS ACCELERATION IS NOT…

A: Yes, It is possible that the speed of the object is equal to zero at the same time its acceleration…

Q: Superman starting from rest has an acceleration of 10m/s 2 up. He makes it 127m into the air before…

A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: false? and why?

A:

Q: a certain car accelerates uniformly from zero to 20.6 m/s in 2.65 s. (a) What is the magnitude of…

A: Given data:  Initial velocity (v0) = 0 m/s Final velocity (v) = 20.6 m/s Time (t) = 2.65 s

Q: A car starts from rest and moves with constant acceleration a = 2.0 m/s2 until it reaches v = 26.0…

A: Given: The initial velocity of the car is u=0 ms. The final velocity of the car is v=26 ms. The…

Q: An Aston Martin V12 Vantage sports car has a “lateral acceleration”of 0.97g = (0.97)(9.8 m/s2) = 9.5…

A: Let v denotes the speed, a denotes the centripetal acceleration of the car, and R denotes the radius…

Q: A train, traveling at a constant speed of 22.0 m/s, comes to an incline with a constant slope. While…

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Q: Initially stationary, a train has a constant acceleration of 0.2 m/s2. (a) What is its speed after…

A: Given , Initial speed of train (u) = 0m/s Acceleration of train (a)= 0.2m/s2

Q: Two trains are moving at 30 m/s in opposite directions on the same track. The engineers see…

A: The law of motion the acceleration is, v2=u2+2ax0=302+2ax1ax1=-450

Q: A train, traveling at a constant speed of 25 m/s, comes to an incline with a constant slope. While…

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Q: As a freely falling object speeds up, what is happening to its acceleration—does it increase,…

A: (a) The motion of an object or a system is said to be as free-fall motion when the motion of the…

Q: A motorboat starting from rest travels in a straight line on a lake. (a) If the boat achieves a…

A: The average acceleration of a body is defined as the ratio of change in velocity upon the time…

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.