A particle moves in a circular path of radius r with speed v. It then increases it speed towhile traveling along the same circular path. By what factor has the centripetal acceleration of the particle changed?
0.25
0.5
2
4
Q.2.
For an object to be in uniform circular motion the direction of the acceleration is
perpendicular to the direction of travel.
parallel to the direction of travel.
diagonally inwards between the direction of travel and the center of the circle.
diagonally outwards away from the center of the circle but in the same direction of travel.
diagonally inwards towards the center of the circle but opposite to the direction of the velocity.
Q.3.
An object in uniform circular motion is (choose all that apply)
traveling at a constant speed
accelerating
not accelerating
moving in one direction
Both A & B
Q.4.
Acceleration causes a change in velocity so acceleration can cause
a change in speed only.
a change in speed or direction.
a change in direction only.
Q.5.
A spin balancer rotates the wheel of a car atrevolutions per minute. What is the angular speed in degrees per second?
16.67 deg / sec
6,000 deg / 1 sec
3,000 deg / 1 sec
180,000 deg / 1 sec
Q.6.
A grindstone spinning at the rate of 8.3 rev/s has what approximate angular speed?
3.2 rad/s
26 rad/s
52 rad/s
81 rad/s
Q.7.
Calculate the amount of centripetal force it takes for a softball pitcher to rotate a ball with a velocity of 3 m/s if the ball weigh 0 .kg and her arm is 0.meters long.
0.38
1.23
0.55
1.66 N
Q.8.
Determine the linear velocity of the tips of the blades for a ceiling fan with 2.m blades rotating at 45.rpm. (give in SI Units)
565.5 m/s
180 m/s
282.7 m/s
90 m/s
Q.9.
The wheels of a car have radius 0.m. and are rotating at 600.0 rpm. Determine the speed of the car in miles/hour to the nearest tenth. (Determine ω (angular velocity) first and then use v=ω⋅r and convert to km/hour)
11.88 km/hour
685.4 km/hour
74.64 km/hour
74640 km/hour
Q.10.
Calculate the mass of an object if it tookN to rotate it in a circle with a radius of 2 meters with a velocity of 4 m/s
4.1 kg
3.6 kg
2.5 kg
1.8 kg
Q.11.
Two bugs ride a turntable which is rotating at a constant rate of 4 rad/s. Bug A is at a radius of 4 cm, while bug B is at a radius of 8 cm. Which of the following is true?
Bug A has a greater angular velocity
Bug B has a greater angular velocity.
Bug A has a greater linear velocity.
Bug B has a greater linear velocity.
Q.12.
Determine the central angle if the arc length iscm and the radius is 5 cm. Convert to degrees.
2°
not possible ... "s" is too small
≈ 114.6°
360°
Q.13.
Centripetal acceleration acts towards the ___________ of the circular motion
centre
circumference
Q.14.
Centripetal force is...
the resultant force acting on a body moving at constant speed in a circle
the outwards force acting on a body moving at constant speed in a circle
Q.15.
Calculate the velocity of an object moved around a circle with a radius of 1.m and an acceleration of 3.5 m/s2.
2.4 m/s
3.6 m/s
3.9 m/s
4.2 m/s
Q.16.
A 1.3 m long fishing line rated as "lb test" that can stand a force oflb (44.N) is attached to a rock of mass 0.5 kg. The maximum speed at which the rock can be rotated without breaking the line is __________.
10.75 ms-1
10.95 m/s
Q.17.
An object is moving round a horizontal circle of radius 0.m, at a constant angular frequency ofrpm. The centripetal acceleration of the object is ___________.
3.53 rad s-1
3.73 rad/s
Q.18.
A particle moves in a horizontal circle of radius 0.m with a constant speed and a period of revolution of 0.s. The linear velocity of the particle is ____________.
188.50 m/s
188.70 ms-1
Q.19.
What's the centripetal force of a 0.2 kg yoyo spun in a circle with a radius of .7 meters at a velocity of 3 m/s?
2.05 N
2.57 N
2.90 N
3.13 N
Q.20.
Calculate the centripetal force required to make a 5 kg ball move 4 m/s in a circle with a radius of 2 m.
10 N
20 N
30 N
40 N
Support mcqgeeks.com by disabling your adblocker.
Please disable the adBlock and continue. Thank you.