Homework Answers
First we draw the free body diagram of the given block. Now by force balance in verticle direction, we find the normal force N.
Now we calculate the maximum static friction. Horizontal component of the applied force is greater than the static friction, so the block moves and now kinetic friction is acting.
Now we apply NSL in horizontal direction to find acceleration of the block.
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Side 7. A 10.0 kg block is at rest on a rough horizontal surface. A force...
A crate of toys (25 kg) is at rest on a rough horizontal surface. The coefficients...
A crate of toys (25 kg) is at rest on a rough horizontal surface. The coefficients of static and kinetic friction (respectively) are 0.5 and 0.2. What minimum force is required to cause the crate to move? Assuming this force is maintained once the crate begins moving, with what acceleration does the crate move?
A 10.0 kg block is resting on a horizontal surface when a force P is applied...
A 10.0 kg block is resting on a horizontal surface when a force
P is applied to it for 7.00 seconds. The variation of P with time
is shown in the figure where P is in Newtons and t is in seconds.
If the coefficients of static and kinetic friction between the
block and the surface are μs = 0.600 and μk = 0.400 respectively,
and g = 10.0 m/s2 calculate
a) [2] The time t_1 at which the block...
A horizontal force of 89.7 N is applied to a 22.5 kg crate on a rough,...
A horizontal force of 89.7 N is applied to a 22.5 kg crate on a rough, level surface. If the crate accelerates at 1.18 m/s2, what is the magnitude of the force of kinetic friction (in N) acting on the crate?
A horizontal force of 89.7 N is applied to a 30.5 kg crate on a rough,...
A horizontal force of 89.7 N is applied to a 30.5 kg crate on a rough, level surface. If the crate accelerates at 1.03 m/s?, what is the magnitude of the force of kinetic friction (in N) acting on the crate? HINT
A block is pulled along a rough horizontal surface by force of magnitude 100 Newtons, at...
A block is pulled along a rough horizontal surface by force of
magnitude 100 Newtons, at an angle of 30 degrees as shown. The
block has a mass M=20.0 kg, and the coefficient of kinetic friction
between the block and the surface is 0.50.
a)The horizontal component of the tension, T, is
b)The normal force exerted upward by the floor on the block has
a magnitude of
c)If the block moves 10.0 m to the right, the work done by...
A 25.0 kg block is at rest on a horizontal surface, with the coefficients of kinetic...
A 25.0 kg block is at rest on a horizontal surface, with the coefficients of kinetic and static friction equal to 0.270 and 0.380, respectively. If a 31.0 N force is pressing down vertically on the block, what applied force is necessary to start the block moving?
11. A BO N. horizontal force is applied on a 10 kg block along a rough...
11. A BO N. horizontal force is applied on a 10 kg block along a rough horizontal surface. If the coefficient of static friction between the block and the surfaces is 0.40 and the coefficient of kinetic friction between the block and the surface hk is 0.3. What is the magnitude of the frictional force that acts on the block? A) 39 N B) 29 N C) 20 N D) 10 N E ) ON
A horizontal force of 4.50 N is applied to a 1.50-kg block, initial at rest on...
A horizontal force of 4.50 N is applied to a 1.50-kg block, initial at rest on a table with a level surface. Will the block move if the coefficient of static friction is µs = 0.580? What is the coefficient of static friction if it just begins to move? What is the acceleration of the block if the coefficient of kinetic friction is 0.150?
A block of mass M is pulled over a rough horizontal surface. The block has a...
A block of mass M is pulled over a rough horizontal surface. The block has a coefficient of kinetic friction with the surface of . The block is subject to the normal force, the friction force, the force of gravity, and a force from a rope of magnitude T which pulls up and to the right at an angle of 0 with the horizontal. The box was initially travelling to the right at speed v = 2.7 m. If M...
A 28.0-kg block is initially at rest on a horizontal surface. A horizontal force of 73.0...
A 28.0-kg block is initially at rest on a horizontal surface. A horizontal force of 73.0 N is required to set the block in motion, after which a horizontal force of 55.0 N is required to keep the block moving with constant speed. (a) Find the coefficient of static friction between the block and the surface. (b) Find the coefficient of kinetic friction between the block and the surface.
A 10.0 kg block is resting on a horizontal surface when a force
P is applied to it for 7.00 seconds. The variation of P with time
is shown in the figure where P is in Newtons and t is in seconds.
If the coefficients of static and kinetic friction between the
block and the surface are μs = 0.600 and μk = 0.400 respectively,
and g = 10.0 m/s2 calculate
a) [2] The time t_1 at which the block...
A horizontal force of 89.7 N is applied to a 30.5 kg crate on a rough, level surface. If the crate accelerates at 1.03 m/s?, what is the magnitude of the force of kinetic friction (in N) acting on the crate? HINT
A block is pulled along a rough horizontal surface by force of
magnitude 100 Newtons, at an angle of 30 degrees as shown. The
block has a mass M=20.0 kg, and the coefficient of kinetic friction
between the block and the surface is 0.50.
a)The horizontal component of the tension, T, is
b)The normal force exerted upward by the floor on the block has
a magnitude of
c)If the block moves 10.0 m to the right, the work done by...
11. A BO N. horizontal force is applied on a 10 kg block along a rough horizontal surface. If the coefficient of static friction between the block and the surfaces is 0.40 and the coefficient of kinetic friction between the block and the surface hk is 0.3. What is the magnitude of the frictional force that acts on the block? A) 39 N B) 29 N C) 20 N D) 10 N E ) ON
A block of mass M is pulled over a rough horizontal surface. The block has a coefficient of kinetic friction with the surface of . The block is subject to the normal force, the friction force, the force of gravity, and a force from a rope of magnitude T which pulls up and to the right at an angle of 0 with the horizontal. The box was initially travelling to the right at speed v = 2.7 m. If M...
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