Search & Filtering
Find the voltage drop in an extension cord having a 0.0600 Ω resistance and through which 5.00 A is flowing.
A wave out in the deep ocean has an amplitude of 1.51 m, a wavelength of 212 m and a period of 14.3 s
What is the speed of such a wave? (in m s−1 to 3 s.f)
A small toy gun fires light foam projectiles by compressing a spring. As the spring relaxes it pushes the projectile.
The toy gun has a spring with a spring constant of 484 N m−1, the spring is compressed by 5.00 cm, and it fires a 10.0 g projectile.
At what speed does the projectile leave the toy gun? (in m s−1 to 3 s.f)
A runaway 185 kg wheeled skip is rolling east along a road with a velocity of +2.2 m s−1. A 2560 kg car moving to the west with a velocity of −9.7 m s−1 hits the skip.
After the collision the skip is moving west with a velocity of −14.4 m s−1.
What is the velocity of the car after the collision? (in m s−1 to 2 s.f)
A person throws a 755 g ball up at an angle such that it has an initial speed of 15.0 m s−1. After a short time the ball has a speed of 5.30 m s−1.
How much higher is the ball than when it was let go? (in m to 3 s.f)
(note: use g = 9.81 m s−2)
A person is riding in a car which is moving at a constant speed around a circular arc.
The person has an accelerometer on their mobile phone and uses it to measure a lateral (horizontal) acceleration of 5.6 m s−2.
If the car was traveling at 50 km h−1 (14 m s−1) then what was the radius of the curve that car was traveling along? (to 2 s.f)
A 64.0 kg person is riding an elevator as shown in the figure above. The elevator is accelerating upwards at a rate of 0.682 m s−2.
For this problem use g = 9.81 m s−2
What is the magnitude of the normal force, the force on the person from the elevator? (in N to 3.s.f)
A car is moving around a banked curve of radius 86 m at a constant speed. The road is banked at an angle of 11° and the car is moving at just the correct speed to ensure that there are no lateral frictional forces on the tyres - that is the only forces acting on the car are the force of gravity and the normal force from the road.
At what speed is the car moving? (in m s−1 to 2 s.f)
A person swings a 350 g ball around their head on a string as shown in the figure above.
The tension in the string is 10 N and the ball moves in a circle of radius 0.93 m at a constant speed of 5.0 m s−1.
What is the angle θ that the string makes with the horizontal? (in ° to 2 s.f)
A reckless hunter is on a boat which is stationary in the middle of a lake.
They fire their gun horizontally 10 times. Each time they fire, a 12 g bullet leaves the gun at a speed of 410 m s−1.
What is the speed of the boat after they have have finished firing their gun if the total mass of the boat, hunter, and gun is 150 kg? (in m s−1 to 2 s.f)
Assume no drag forces from the water.
