3. Planet X-39 has a mass equal to 1/3 that of Earth and a radius equal to 1/3 that of Earth. If v is the escape speed for Earth, what is the escape speed for X-39?
A motorcycle moving at 50 km/h skids 10 m with locked brakes. How far will it skid with locked ...
A motorcycle moving at 50 km/h skids 10 m with locked brakes. How far will it skid with locked brakes when traveling at 150 km/h? A) 10 m B) 30 m C) 50 m D) 90 m
A 20-g bead is attached to a light 120-cm-long string as shown in the figure. This bead moves in a ...
[html]A 20-g bead is attached to a light 120-cm-long string as shown in the figure. This bead moves in a horizontal circle with a constant speed of 1.5 m/s. What is the tension in the string if the angle α is
A frictionless pulley, which can be modeled as a 0.86kg solid cylinder with a 0.31m radius, has a rope going over it, as shown in the figure. (Figure 1 attached) The tensions in the rope are 12N and 10N . What is the angular acceleration of the
Two spaceships approach Earth from the same direction. One has a speed of 0.21c and the other a ...
Two spaceships approach Earth from the same direction. One has a speed of 0.21c and the other a speed of 0.34c, both relative to Earth. What is the speed of one spaceship relative to the other? A) 0.13c B) 0.14c C) 0.15c D) 0.16c
Planet Z-34 has a mass equal to 1/3 that of Earth, a radius equal to 1/3 that of Earth, and an axial ...
Planet Z-34 has a mass equal to 1/3 that of Earth, a radius equal to 1/3 that of Earth, and an axial spin rate 1/2 that of Earth. With g representing, as usual, the acceleration due to gravity on the surface of Earth, the acceleration due to gravity
A 2.0-kg block slides on a rough horizontal surface. A force (magnitude P = 4.0 N) acting parallel ...
A 2.0-kg block slides on a rough horizontal surface. A force (magnitude P = 4.0 N) acting parallel to the surface is applied to the block. The magnitude of the block's acceleration is 1.2 m/s2 . If P is increased to 5.0 N, determine the magnitude of
In April 1974, Steve Prefontaine completed a 10.0-km race in a time of 27 min, 43.6 s. Suppose “Pre” was at the 9.00-km mark at a time of 25.0 min even. If he accelerates for 60.0 s and maintains the increased speed for the duration of the race, calc
In a closed system of a cannon and cannonball which changes would both result in an increase in the ...
In a closed system of a cannon and cannonball which changes would both result in an increase in the kinetic energy of the cannonball when fired from the cannon?
A 10.0-kg uniform ladder that is 2.50 m long is placed against a smooth vertical wall and reaches to ...
[html]A 10.0-kg uniform ladder that is 2.50 m long is placed against a smooth vertical wall and reaches to a height of 2.10 m, as shown in the figure. The base of the ladder rests on a r
A man uses a 2.25-m long wooden board inclined at 35° with the horizontal to raise a 150 kg ...
[html]A man uses a 2.25-m long wooden board inclined at 35° with the horizontal to raise a 150 kg package. He then pushes forward with a force of 125 N to move the package 4.6 m across a level surface. Find the work done by the man.NOTE: SH
An object with a mass of 5.13 kg is placed on top of a spring and compresses the spring by 0.25 m. ...
An object with a mass of 5.13 kg is placed on top of a spring and compresses the spring by 0.25 m. (a) What is the force constant of the spring? (b) How high will this object go when the spring releases its energy?
A 76 kg man starts from rest at the top of a 12.0-m long water slide that is inclined 65° with the ...
[html]A 76 kg man starts from rest at the top of a 12.0-m long water slide that is inclined 65° with the horizontal. In sliding down, he encountered a frictional force of 45.0 N. (a) What is the speed of the man at the bottom of the slide? (b) What i
A 76 kg man starts from rest at the top of a 12.0-m long water slide that is inclined 65° with the ...
[html]A 76 kg man starts from rest at the top of a 12.0-m long water slide that is inclined 65° with the horizontal. In sliding down, he encountered a frictional force of 45.0 N.(a) What is the speed of the man at the bottom of the slide?
A piece of glass has a thin film of gasoline floating on it. A beam of light is shining ...
A piece of glass has a thin film of gasoline floating on it. A beam of light is shining perpendicular on the film. If the wavelength of light incident on the film is 560 nm and the indices of refraction of gasoline and glass are 1.40 and 1.50, respec
A 76 kg man starts from rest at the top of a 12.0-m long water slide that is inclined 65° with the ...
[html]A 76 kg man starts from rest at the top of a 12.0-m long water slide that is inclined 65° with the horizontal. In sliding down, he encountered a frictional force of 45.0 N. Suppose the man landed horizontally into the water, how far will he tra
Write A if the statement is true, but if false, write B and then change the word(s) in the ...
Write A if the statement is true, but if false, write B and then change the word(s) in the parentheses to make it true.The amount of work done on a body equals the change in (kinetic energy) of the body
A 3.2 kg crates slides along a 6.0 m horizontal surface with speed of 5.0m/s. It then moves down ...
[html]A 3.2 kg crates slides along a 6.0 m horizontal surface with speed of 5.0m/s. It then moves down along an incline with a lenth 6.0m and a height from the ground of 4.5 mand then along a second, lower horizontal surface. The second horizontal su
The unstretched length of a spring is 35.0 cm. When a load of 2.0 kg is attached to the lower end of ...
[html]The unstretched length of a spring is 35.0 cm. When a load of 2.0 kg is attached to the lower end of the spring, the spring elongates by 2.0 cm. What is the force constant of the spring? How much work is needed to increase its length from 35.0
An object with a mass of 0.75 kg is projected over a horizontal surface with a speed of 2.5 m/s. It ...
[html]An object with a mass of 0.75 kg is projected over a horizontal surface with a speed of 2.5 m/s. It then comes to rest after 3.0 s.(a) How much is the change in kinetic energy of the object.
An object with a mass of 0.75 kg is projected over a horizontal surface with a speed of 2.5 m/s. It ...
An object with a mass of 0.75 kg is projected over a horizontal surface with a speed of 2.5 m/s. It then comes to rest after 3.0 s.(b) How much work is done on the object?
An object with a mass of 0.75 kg is projected over a horizontal surface with a speed of 2.5 m/s. It ...
An object with a mass of 0.75 kg is projected over a horizontal surface with a speed of 2.5 m/s. It then comes to rest after 3.0 s.(d) What is the value of kinetic friction?
An object with a mass of 0.75 kg is projected over a horizontal surface with a speed of 2.5 m/s. It ...
An object with a mass of 0.75 kg is projected over a horizontal surface with a speed of 2.5 m/s. It then comes to rest after 3.0 s.(e) What is the coefficient of kinetic friction?
A 375 g ball is thrown vertically upward with a speed of 3.0 m/s. How high did it go? How fast is it ...
A 375 g ball is thrown vertically upward with a speed of 3.0 m/s. How high did it go? How fast is it moving when it is 0.25 m high?How fast is it moving when it is 0.25 m high?
The energy content of food is usually given in Calories. One Calorie is equal to 4186 J. Suppose a ...
[html]The energy content of food is usually given in Calories. One Calorie is equal to 4186 J. Suppose a person uses 2000 Calories in a day to keep his vital organs functioning.(a) How much energy in joules is used?
A stone is thrown upwards with an initial velocity of 25m/s at an angle of 30 degree to the ground ...
A stone is thrown upwards with an initial velocity of 25m/s at an angle of 30 degree to the ground then without any calculation state what the stone vertical velocity will be when it again reaches ground level
A stone is thrown upwards with an initial velocity of 25m/s at an angle of 30 degree to the ground ...
A stone is thrown upwards with an initial velocity of 25m/s at an angle of 30 degree to the ground then using the answer of this question show that the stone will rise to a height of about 8m
A stone is thrown upwards with an initial velocity of 25m/s at an angle of 30 degree to the ground ...
A stone is thrown upwards with an initial velocity of 25m/s at an angle of 30 degree to the ground then find how long will it take between when the stone was thrown and when it comes back to the ground?
A stone is thrown upwards with an initial velocity of 25m /s at an angle of 30 degree to the ground ...
A stone is thrown upwards with an initial velocity of 25m /s at an angle of 30 degree to the ground then explain why the horizontal component of the stone velocity at the start is 21.7m/s?
