Physics Kinematics Level: High School
On mountainous downhill roads, escape routes are sometimes placed to the side of the road for trucks whose brakes must fall . Assuming a constant upward slope of 32 degrees . calculate the horizontal and vertical components of the acceleration of a truck that slowed from 120 km/h to rest in 6.0 s.
Physics Kinematics Level: High School
A boat whose speed in still water is 1.70 m/s . must cross a 260 m wide and arrive at a point 110 m upstream from where it starts from . To do so, the pilot must head the boat at a 45 degree upstream angle . What is the speed of the river’s current ?
Physics Force & Laws Of Motion Level: High School
An object is held in place by friction on an inclined surface . The angle of inclination is increased until the object starts moving . If the surface is kept at this angle , the object ,a. slows down.
b. moves at uniform speed
c. speeds up.
d. none of the above.
Physics Force & Laws Of Motion Level: High School
A constant force is exerted on a cart that is initially at rest on an air track . Friction between the cart and the track is negligible . The force acts for a short time interval and gives the cart a certain final speed . To reach the same final speed with a force that is only half as big , the force must be exerted on the cart for a time interval la. four times as long as
b. twice as long as
c. equal to
d. half as long.
e. a quarter of
Physics Force & Laws Of Motion Level: High School
A block of mass M is at rest on an inclined plane and is connected to an object of the same mass as shown in the diagram . Both the rope and the pulley have negligible masses , and the pulley has excellent ball bearings , so it is nearly frictionless . The coefficient of friction between the bock and the plane is M(sub s). What is the magnitude of the static frictional force in terms of M, g and angle theta
Physics Force & Laws Of Motion Level: High School
A 300 g ball is hit by a bat and leaves the bat at 100 Km/hr . Find the force on the bat if the collision lasts for 2 milliseconds .
Physics Force & Laws Of Motion Level: High School
A 300 g ball is hit by a bat and leaves the bat at 100 Km/hr . Find the force on the bat if the collision lasts for 2 milliseconds .
Physics Force & Laws Of Motion Level: High School
Conservation of linear momentum
A 10 gram arrow is fired at 600 m/s into a 10 kg wooden block at rest, and gets embedded in it . Find the speed of the block .
Physics Force & Laws Of Motion Level: High School
Conservation of linear momentum
A 60 kg skater initially at rest pushes a 70 kg skater and gives her a velocity of 4 m/s away from him . What is the velocity of the 60 kg skater ?
Physics Kinematics Level: High School
How fast does a 1500 kg car have to travel to have the same momentum as a 4000 kg truck moving at 60 km/hr ?
Physics Force & Laws Of Motion Level: High School
While on an elevator , Jaden’s apparent weight is 550 N, When he is in ground , the scale reading is 633 N . What is Jaden’s acceleration while on the elevator ? (Take the y axis point upward )
Physics Kinematics Level: High School
Projectile motion
An arrow is shot into the air at an angle of 61.4 degree above the horizontal with a speed of 21.8 m/s .a. What are the x and y components of the velocity of the arrow 3.3 s after it leaves the bowstring ?
b. What are the x and y components of the displacement of the arrow during the 3.3 s interval ?
Physics Kinematics Level: High School
Projectile motion
A ball is thrown from a point 1.2 m above the ground . The initial velocity is 18.8 m/s at an angle of 31.0 degree above the horizontal .a. Find the maximum height of the ball above the ground .
b. Calculate the speed of the ball at the highest point in the trajectory .
Physics Kinematics Level: High School
A stone is launched straight up by a slingshot . Its initial speed is 18.6 m/s and the stone is 1.30 m above the ground when launched . Assuming g = 9.80 m/s^2.a. How high above the ground does the stone rise ?
b. How much time elapses before the stone hits the ground ?
Physics Kinematics Level: High School
A 63 kg lead ball is dropped from the leaning tower of Pisa . The tower is 57 m high .a. How far does the ball fall in the first 2.0 seconds of flight ?
b. What is the speed of the ball after it has traveled 1.6 m downward ?
c. What is the speed of the ball 1.9 s after it is released ?
