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A 3.56 kg block resting on a smooth horizontal surface is attached to a string that passes over a frictionless pulley as shown in the figure. The pulley has a radius of 0.28 m. A force of 7.5 N pulls the other end of the string. As a result, the block moves a distance of 0.2 m starting from rest. Find the (a) acceleration of the block, (b) angular acceleration of the pulley, and (c) moment of inertia of the pulley.
Determine the velocities of two masses after collision of a 6 – kg mass moving with a velocity of 6 m/s and a 4 – kg mass that is moving with a velocity of 3 m/s if there are no external forces acting on them.
A. e=Vs/Va
B. What are the given data?
C-1. Calculate using the law on conservation of momentum: (equation 1)
mAuA+mBuB=mAVA+mBVB
C-2. and the coefficient of restitution: (equation 2)
e=VB-VA/uB-uA
D. Substitute in equation 1:
E. Substitute in equation 2:
F. Conclusion:
A small 15.0 g plastic ball is suspended by a 30.0 cm string in a uniform electric field of
3000 N/C, as shown in the picture. If the ball is in equilibrium when the string makes a 45° angle with the vertical as indicated, what is the net charge on the ball?A 3.56 kg block resting on a smooth horizontal surface is attached to a string that passes over a frictionless pulley as shown in the figure. The pulley has a radius of 0.28 m. A force of 7.5 N pulls the other end of the string. As a result, the block moves a distance of 0.2 m starting from rest. Find the (a) acceleration of the block, (b) angular acceleration of the pulley, and (c) moment of inertia of the pulley.
Joana Marie is a swimmer. She swims directly across a river flowing at 4 m/s with a velocity of 2 m/s. What will be the actual velocity of Joana Marie relative to the river? Determine its angle.
Daisy is running 5 m/s due East while crossing with Joel who is running 4 m/s due North. What is Daisy's actual velocity and angle relative to Joel's?
A sniper with a mass of 7 kg fires a 100 g bullet at a speed of 450 m/s. Solve for the recoil velocity of the sniper.
Arlene is stationary relative to the ground. Aiza is riding toward Arlene on her e-bike 5 m/s relative to the ground. Aiza throws a water balloon forward at 3 m/s relative to the e-bike. With what speed does it strike Arlene?A 0.15kg tumor is treated with α
α particles. There are 2×10
12
2×1012 particles reaching the tumor every second, each having energy 3×10
−15
3×10−15J. What is the absorbed dose given to the tumor
A simple pendulum takes 23.5 seconds to complete 20 cycles. What is the period (T) and frequency of the pendulum?
