Homework Answers
deceleration during 10m is mu_k*g = 0.2*10 = 2m/s^2
final Velocity when block enters ramp
Now when it travels above velocity
Now at the top position, the block stops
f=mu*N
Put Vf from this into energy equation
Using the above two equations we get
a) 
b) As the radius of ramp and Vi is independent of mass of block the doubled mass will require same ramp
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Full Solution 1. An object with a speed v= 10.0 m/s experiences friction against the ground...
Th figure below shows a mass m=1.0 kg which is initially moving with speed v=7.2 m/s...
Th figure below shows a mass m=1.0 kg which is initially moving with speed v=7.2 m/s at the top of a frictionless hill of height h=3.5 m. It slides down the hill until it encounters a flat section with unknown coefficient of kinetic friction Hk. If the object travels a distance D=10.9 m before reaching a speed of v/2, what is the coefficient of kinetic friction Mk? Select one: O 0.35 O 0.40 O 0.55 O 0.50 O 0.30
2. Mass mi -10.0 kg is initially held against the spring of spring constant k-100 N/m....
2. Mass mi -10.0 kg is initially held against the spring of spring constant k-100 N/m. The spring is compressed a distance x 0.45 m. When released, m is fired towards a block of mass m2-4.4 kg initially at rest at the edge of a horizontal, frictionless table of height h-0.75 m. A ramp is placed at the end of the table. The ramp has a coefficient of kinetic friction μ.-0.25 and is a distance d-1.06 m long. The blocks...
Th figure below shows a mass m=1.0 kg which is initially moving with speed v=7.2 m/s...
Th figure below shows a mass m=1.0 kg which is initially moving
with speed v=7.2 m/s at the top of a frictionless hill of height
h=4.9 m. It slides down the hill until it encounters a flat section
with unknown coefficient of kinetic friction µk. If the object
travels a distance D=11.1 m before reaching a speed of v/2, what is
the coefficient of kinetic friction µk? (use picture, but first
question)
Th figure below shows a mass m=1.0 kg...
The figure below shows a mass m=1.0 kg which is initially moving with speed v=6.7 m/s...
The figure below shows a mass m=1.0 kg which is initially moving
with speed v=6.7 m/s at the top of a frictionless hill of height
h=4.9 m. It slides down the hill until it encounters a flat section
with unknown coefficient of kinetic friction µk. If the
object travels a distance D=10.8 m before reaching a speed of v/2,
what is the coefficient of kinetic friction µk?
✓ -D h
show that the friction is zero. fs=(mgsin(teta))/(1+c^-1) Question 2 A circular object (disc, hoop, sphere) of...
show that the friction is zero.
fs=(mgsin(teta))/(1+c^-1)
Question 2 A circular object (disc, hoop, sphere) of mass M and radius R rolls from rest, down a slope from a heighth above the ground as shown in the figure Masine The acceleration of the centre of mass is given by q sin асы - The force of static friction is given by Ng sine CMR Show that the friction where the moment of inertia for the rolling object is of the...
Th figure below shows a mass m=1.0 kg which is initially moving with speed v=6.8 m/s...
Th figure below shows a mass m=1.0 kg which is initially moving
with speed v=6.8 m/s at the top of a frictionless hill of height
h=3.7 m. It slides down the hill until it encounters a flat section
with unknown coefficient of kinetic friction µk. If the
object travels a distance D=11.6 m before reaching a speed of v/2,
what is the coefficient of kinetic friction µk?
D— h
Th figure below shows a mass m=1.0 kg which is initially moving with speed v=6.7 m/s...
Th figure below shows a mass m=1.0 kg which is initially moving
with speed v=6.7 m/s at the top of a frictionless hill of height
h=4.8 m. It slides down the hill until it encounters a flat section
with unknown coefficient of kinetic friction µk. If the object
travels a distance D=10.5 m before reaching a speed of v/2, what is
the coefficient of kinetic friction µk?
D h
Th figure below shows a mass m=1.0 kg which is initially moving with speed v=9.0 m/s...
Th figure below shows a mass m=1.0 kg which is initially moving with speed v=9.0 m/s at the top of a frictionless hill of height h=4.1 m. It slides down the hill until it encounters a flat section with unknown coefficient of kinetic friction Hk. If the object travels a distance D=11.5m before reaching a speed of v/2, what is the coefficient of kinetic friction ik? Select one: 0.69 0.44 0.38 0.50 0.63
Th figure below shows a mass m=1.0 kg which is initially moving with speed v=6.9 m/s...
Th figure below shows a mass m=1.0 kg which is initially moving with speed v=6.9 m/s at the top of a frictionless hill of height h=4.7 m. It slides down the hill until it encounters a flat section with unknown coefficient of kinetic friction Uk. If the object travels a distance D=11.9 m before reaching a speed of v/2, what is the coefficient of kinetic friction Mk? D Select one: O 0.44 O 0.60 O 0.33 O 0.38 O 0.55
Th figure below shows a mass m=1.0 kg which is initially moving with speed v=6.9 m/s...
Th figure below shows a mass m=1.0 kg which is initially moving with speed v=6.9 m/s at the top of a frictionless hill of height h=4.7 m. It slides down the hill until it encounters a flat section with unknown coefficient of kinetic friction Uk. If the object travels a distance D=11.9 m before reaching a speed of v/2, what is the coefficient of kinetic friction uk? D Select one: O 0.44 O 0.60 O 0.33 O 0.38 O 0.55
Th figure below shows a mass m=1.0 kg which is initially moving with speed v=7.2 m/s at the top of a frictionless hill of height h=3.5 m. It slides down the hill until it encounters a flat section with unknown coefficient of kinetic friction Hk. If the object travels a distance D=10.9 m before reaching a speed of v/2, what is the coefficient of kinetic friction Mk? Select one: O 0.35 O 0.40 O 0.55 O 0.50 O 0.30
2. Mass mi -10.0 kg is initially held against the spring of spring constant k-100 N/m. The spring is compressed a distance x 0.45 m. When released, m is fired towards a block of mass m2-4.4 kg initially at rest at the edge of a horizontal, frictionless table of height h-0.75 m. A ramp is placed at the end of the table. The ramp has a coefficient of kinetic friction μ.-0.25 and is a distance d-1.06 m long. The blocks...
Th figure below shows a mass m=1.0 kg which is initially moving
with speed v=7.2 m/s at the top of a frictionless hill of height
h=4.9 m. It slides down the hill until it encounters a flat section
with unknown coefficient of kinetic friction µk. If the object
travels a distance D=11.1 m before reaching a speed of v/2, what is
the coefficient of kinetic friction µk? (use picture, but first
question)
Th figure below shows a mass m=1.0 kg...
The figure below shows a mass m=1.0 kg which is initially moving
with speed v=6.7 m/s at the top of a frictionless hill of height
h=4.9 m. It slides down the hill until it encounters a flat section
with unknown coefficient of kinetic friction µk. If the
object travels a distance D=10.8 m before reaching a speed of v/2,
what is the coefficient of kinetic friction µk?
✓ -D h
show that the friction is zero.
fs=(mgsin(teta))/(1+c^-1)
Question 2 A circular object (disc, hoop, sphere) of mass M and radius R rolls from rest, down a slope from a heighth above the ground as shown in the figure Masine The acceleration of the centre of mass is given by q sin асы - The force of static friction is given by Ng sine CMR Show that the friction where the moment of inertia for the rolling object is of the...
Th figure below shows a mass m=1.0 kg which is initially moving
with speed v=6.8 m/s at the top of a frictionless hill of height
h=3.7 m. It slides down the hill until it encounters a flat section
with unknown coefficient of kinetic friction µk. If the
object travels a distance D=11.6 m before reaching a speed of v/2,
what is the coefficient of kinetic friction µk?
D— h
Th figure below shows a mass m=1.0 kg which is initially moving
with speed v=6.7 m/s at the top of a frictionless hill of height
h=4.8 m. It slides down the hill until it encounters a flat section
with unknown coefficient of kinetic friction µk. If the object
travels a distance D=10.5 m before reaching a speed of v/2, what is
the coefficient of kinetic friction µk?
D h
Th figure below shows a mass m=1.0 kg which is initially moving with speed v=9.0 m/s at the top of a frictionless hill of height h=4.1 m. It slides down the hill until it encounters a flat section with unknown coefficient of kinetic friction Hk. If the object travels a distance D=11.5m before reaching a speed of v/2, what is the coefficient of kinetic friction ik? Select one: 0.69 0.44 0.38 0.50 0.63
Th figure below shows a mass m=1.0 kg which is initially moving with speed v=6.9 m/s at the top of a frictionless hill of height h=4.7 m. It slides down the hill until it encounters a flat section with unknown coefficient of kinetic friction Uk. If the object travels a distance D=11.9 m before reaching a speed of v/2, what is the coefficient of kinetic friction Mk? D Select one: O 0.44 O 0.60 O 0.33 O 0.38 O 0.55
Th figure below shows a mass m=1.0 kg which is initially moving with speed v=6.9 m/s at the top of a frictionless hill of height h=4.7 m. It slides down the hill until it encounters a flat section with unknown coefficient of kinetic friction Uk. If the object travels a distance D=11.9 m before reaching a speed of v/2, what is the coefficient of kinetic friction uk? D Select one: O 0.44 O 0.60 O 0.33 O 0.38 O 0.55
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