12,854 Answered Questions for the topic physics

Physics

08/28/22

Object at rest and fall

An object starts from rest and falls under the influ- ence of gravity. Draw graphs of (a) its speed and (b) the distance it has fallen, as a function of time from t = 0 to t = 5.00 s. Ignore air... more
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Physics

08/28/22

Speed and height reached

A ball player catches a ball 3.4 s after throwing it vertically upward. With what speed did he throw it, and what height did it reach?
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Physics

08/28/22

Free falling objects
A stone is dropped from the top of a cliff. It is seen tohit the ground below after 3.55 s. How high is the cliff?
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Physics

08/28/22

Magnitude of acceleration

A car traveling at 95 km/h strikes a tree. The front end of the car compresses and the driver comes to rest after traveling 0.80 m. What was the magnitude of the average acceleration of the driver... more
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Physics

08/28/22

Constant velocity and acceleration

A sports car moving at constant velocity travels 120 m in 5.0 s. If it then brakes and comes to a stop in 4.0 s, what is the magnitude of its acceleration (assumed constant) in m/s2, and in g’s (g... more
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Physics

08/27/22

Travel time and speed

A car slows down uniformly from a speed of 28.0 m/s to rest in 8.00 s. How far did it travel in that time?
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Physics

08/27/22

.....Mechanicsl
A speeding boda boda cyclist rides through 50 km/he zone at 70 km/he without noticing a stationery police patrol pick up. The patrol officer immediately heads after the boda boda cyclist,... more
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Physics

08/27/22

Acceleration and time
A car accelerates from 14 m/s to 21 m/s in 6.0 s. What was its acceleration? How far did it travel in this time? Assume constant acceleration.
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Physics

08/26/22

Physics 1 question
A bookstore offers 95 micromiles of free bubble gum tape with every purchase over $50. When he makes a purchase, how much free gum does he get, as measured in centimeters?
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Physics

08/26/22

Projectile motion
A ball is thrown from near the ground at an angle of 45 degrees with the ground. The initial speed is 40 m/s. a) What is the magnitude and direction of acceleration when the ball reaches it's max... more
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Physics

08/26/22

My question was a little long, so it is in the description! PHYSCIS 2 QUESTION
Two charges, q1 = +4.0 μC and q2 = -9.0 μC, lie along the x axis in a vacuum. Find the position of the third charge so that the net force on it is zero, if the two charges are 20 cm apart? Assume... more
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Physics

08/26/22

I have a question on acceleration, my name is Michael
If a hockey player starts form rest and accelerates at a rate of 2.1 m/s2 how long does it take him to skate 30 m
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Physics

08/26/22

a positive charge of magnitude Q1 = 0.95nC is located at the origin
a positive charge of magnitude Q1 = 0.95nC is located at the origin. A negative charge Q2 = -8.5nC is located on the positive x-axis at x=11cm from the origin. The point P is located y =17cm above... more
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Physics

08/25/22

The electrical force experienced by a -3.4μC charge at some point P has a magnitude of 19.8N and points due North.
The electrical force experienced by a -3.4μC charge at some point P has a magnitude of 19.8N and points due North. What is the ratio of the magnitude of the acceleration of an electron to that of a... more
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Physics

08/24/22

Speed and time physics
Two locomotives approach each other on parallel tracks. Each has a speed of 155 km/h with respect to the ground. If they are initially 8.5 km apart, how long will it be before they reach each other?
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Physics

08/24/22

Calculating speed and velocity
A person jogs eight complete laps around a 400-m track in a total time of 14.5 min. Calculate (a) the average speed and (b) the average velocity, in m/s.
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Physics

08/24/22

Physics 101 km/h
A bird can fly 25 km/h. How long does it take to fly 3.5 km?
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Physics

08/24/22

Velocity physics 101
You drop a rock off a bridge. When the rock has fallen 4 m, you drop a second rock. As the two rocks continue to fall, what happens to their velocities?(a) Both increase at the same rate.(b) The... more
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Physics

08/24/22

Motions and constant acceleration

Which of these motions is not at constant acceleration: a rock falling from a cliff, an elevator moving from the second floor to the fifth floor making stops along the way, a dish resting on a... more
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Physics

08/24/22

Velocity and acceleration

Can an object have zero velocity and nonzero accelera- tion at the same time? please give examples.
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Physics

08/24/22

Free fall word problem
As a freely falling object speeds up, what is happening to its acceleration—does it increase, decrease, or stay the same? (a) Ignore air resistance. (b) Consider air resistance.
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Physics

08/24/22

Physics Word problem

Two cars emerge side by side from a tunnel. Car A is trav- eling with a speed of 60 km/h and has an acceleration of 40 km/h/min. Car B has a speed of 40 km/h and has an acceleration of 60 km/h/min.... more
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08/23/22

Tent pole question
A 2.3 m tent pole is supported by a 2.7 m rope anchored in the ground some distance from the foot of the pole. Find the angle between the ground and the rope, to the nearest degree. (3 marks)
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Physics

08/23/22

Eliot supplied 2000 calories of heat to 500 grams of lead at 25°C.

What is the final temperature of the lead? The specific heat capacity of lead is 0.031 cal/g°C.
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Physics

08/23/22

The heat required to raise 3kg of copper from 0°C to 10°C raises 1 kg of lead from 10°C to 100°C.

If the specific heat capacity of copper is 0.095 cal/g°C, find the specific heat capacity of lead.
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