Physics Force & Laws Of Motion Level: University
Two people pull on a stubborn mule. Find (a) The single force that is equivalent to the two force shown and (b) The force that a third person would have to exert on the mule to make the net force equal to zero.
Physics Force & Laws Of Motion Level: University
A 100lb weight is hanging from a spool the brake is released on the spool to allow the weight to fall at 10 feet per second what is the formula to determine the weight of the weight while falling? would this formula apply to all weights and rates of fall?
Physics Force & Laws Of Motion Level: University
ImpulseIn a typical golf swing the club is in contact with the ball for about 0.0012 s. If the 45 g ball acquires a speed of 73 m/s estimate the magnitude of the force exerted by the club on the ball.
Physics Force & Laws Of Motion Level: High School
Impulse
A batter hits a 0.140 kg baseball that was approaching him at 40.0 m/s and , as a result , the ball leaves the bat at 30.0 m/s in the direction of the pitcher . What is the magnitude of the impulse delivered to the baseball ?
a) 9.80 Ns
b) 1.40 Ns
c) 5.60 Ns
d) 7.00 Ns
Physics Force & Laws Of Motion Level: High School
Impulse
In a collision between two unequal masses , how does the impulse imparted to the smaller mass by the larger mass compare with the impulse imparted to the larger mass by the smaller one ?
a) it is larger
b) it is smaller
c) They are equal
d) The answer depends on how fast they are moving .
Physics Force & Laws Of Motion Level: High School
Impulse
A golf club exerts an average force of 1000 N on a 0.45 kg golf ball which is initially at rest . The club is in contact with the ball for 1.8 ms . What is the speed of the golf ball as it leaves the tee ?
a) 35 m/s
b) 40 m/s
c) 45 m/s
d) 50 m/s
Physics Force & Laws Of Motion Level: High School
A 0.330 kg volleyball is thrown vertically downward with a speed of 0.150 m/s . It takes it 0.0655 s to reach the ground .What is the magnitude of its momentum just before it hits the ground ?
a) 0.212 kg x m/s
b 0.262 kg x m/s
c) 0.163 kg m/s
d) 0.0216 kg x m/s
Physics Force & Laws Of Motion Level: High School
Impulse
A golf club exerts an average force of 1000 N on a 0.045 kg golf ball which is initially at rest . The club in contact with the ball for 1.8 ms . What is the speed of the golf ball as it leaves the tee ?
a) 35 m/s
b) 40 m/s
c) 45 m/s
d) 50 m/s
Physics Force & Laws Of Motion Level: High School
Conservation of momentum
Two air track carts move along an air track towards each other . Cart A has a mass of 450 g and moves toward the right with a speed of 0.850 m/s and air track cart B has a mass of 300 g and moves towards the left with a speed of 1.12 m/s. What is the total momentum of the system ?
a) 0.047 kg x m/s toward the right .
b) 0.719 kg x m/s toward the right .
c) 0.750 kg x m/s toward the right .
d) 0.750 kg m/s toward the left .
Physics Force & Laws Of Motion Level: High School
Conservation of momentum
A firecracker breaks up into two pieces , one has a mass of 200 g and files off along the x –axis with a speed of 82.0 m/s and the second has a mass of 300 g and flies off along the y-axis with a speed of 45.0 m/s . What is the total momentum of the two pieces ?
a) 361 kg x m/s at 56.3 degrees from the x-axis .
b) 93.5 kg x m/s at 28.8 degrees from the x-axis .
c) 21.2 kg x m/s at 39.5 degrees from the x-axis .
d) 361 kg d m/s at 0.983 degrees from the x-axis .
Physics Force & Laws Of Motion Level: High School
A vertical aerial AB, 9.60 m high stands on ground , which is inclined 12 degrees to the horizontal , a stay connects the top of the aerial A to a point C on the ground 10.0 m downhill from B , the foot of the aerial . Determine the length of the stay and the angle the stay makes with the ground .
Physics Force & Laws Of Motion Level: High School
Three forces acting on a fixed point are represented by the sides of a triangle of dimensions 7.2 cm , 9.6 cm and 11.0 cm , Determine the angles between the lines of action and the three forces .
Physics Force & Laws Of Motion Level: High School
A box is hurled up the inclined plane of the above question starts up the plane with an initial velocity of 1000 cm/sec . Find the speed of the box moving up the plane 3 sec later .a) 0 cm/sec
b) -5.5 cm/sec
c) 8.9 cm/sec
d) 10.1 cm/sec
e) 42.4 cm/sec
f) 63.3 cm/sec
g) 75.3 cm/sec
h) 98.1 cm/sec
Physics Force & Laws Of Motion Level: High School
A box is sliding down a plane inclined at an angle of 20 degree from the horizontal . Find the acceleration of the box , neglecting friction and air resistance .
Physics Force & Laws Of Motion Level: High School
United States currency is printed using intaglio presses that generate a printing pressure of 8.90 104 lb/in^2 . A $20 bill is 6.1 by 2.6 in. Calculate the magnitude of the force that the printing press applies to one side of the bill .