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A rhinoceros is at the origin of coordinates at t1 = 0. For the time interval from 0 to 12 sec, the rhino’s average velocity has x-component -3.8 m/s and y-component 4.9 m/s. At t2 = 12 sec, (a) what are the x- and y-component of the rhino’s position? (b) How far is the rhino from the origin?
A squirrel has x- and y-coordinates (1.1 m, -0.5 m) at time t1 = 0 sec and coordinates (5.3 m, 3.4 m) at time t2 = 3.0 sec. For this interval, find (a) the components of average velocity; (b) the magnitude and direction of average velocity.
In an experiment, the following readings were observed;
Volume of alcohol flowing per minute= 10^-5m^3
Density of alcohol = 800kg/m^3
Length of tube was 0.5m
Radius of tube is 0.05cm and the height of alcohol is 60cm. Calculate the coefficient of viscosity of alc ohol
The efficiency of machine of 60% calculate the work done by a man using this machine load of 250kg through a vertical distance of 2.5m
How can you throw a projectile so that it has zero speed at the top of its trajectory? So that it has nonzero speed at the top of its trajectory?
Determine which of the following moving objects obeys the equations of projectile motion: (A) A ball is thrown in an arbitrary direction. (B) A jet airplane crosses the sky with its engine thrusting the plane forward. (C) A rocket leaves the launch pad. (D) A rocket moves through sky after its engines have failed. (E) A stone is thrown under water
Correct the following statement: “The racing car rounds a turn at a constant velocity of 90 miles an hour.”
Explain whether the following particles do or do not have an acceleration (a) a particle moving in a straight path with constant speed and (b) a particle moving around a curve with constant speed.
Suppose you are carrying a ball and running at constant speed, and wish to throw the ball and catch it back down. Should you (a) throw the ball at an angle of about 45º above the horizontal and maintain the same speed, (b) throw the ball straight up in the air and slow down to catch it, or (c) throw the ball straight up in the air and maintain the speed?
When a projectile reaches its maximum height, Is its speed zero? Explain.
